Trial Outcomes & Findings for Comparison of SYN023 to Human Rabies Immune Globulin in Post Exposure Prophylaxis of Rabies (NCT NCT03961555)

NCT ID: NCT03961555

Last Updated: 2026-01-16

Results Overview

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT).

Recruitment status

COMPLETED

Study phase

PHASE2

Target enrollment

448 participants

Primary outcome timeframe

Day 8

Results posted on

2026-01-16

Participant Flow

Participant milestones

Participant milestones
Measure
Low Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Overall Study
STARTED
45
35
184
184
Overall Study
COMPLETED
45
34
178
178
Overall Study
NOT COMPLETED
0
1
6
6

Reasons for withdrawal

Reasons for withdrawal
Measure
Low Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Overall Study
Lost to Follow-up
0
0
1
0
Overall Study
Withdrawal by Subject
0
0
2
4
Overall Study
Death
0
1
0
0
Overall Study
Other
0
0
2
2
Overall Study
No treatment received
0
0
1
0

Baseline Characteristics

Comparison of SYN023 to Human Rabies Immune Globulin in Post Exposure Prophylaxis of Rabies

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=45 Participants
This includes all participants in the Low Risk Group (LRG) receiving SYN023+Rabies Vaccine.
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=35 Participants
This includes all participants in the Low Risk Group (LRG) receiving Human Rabies Immune Globulin (HRIG)+Rabies Vaccine.
Normal Risk Group: SYN023+Rabies Vaccine
n=183 Participants
This includes all participants in the Normal Risk Group (NRG) receiving SYN023+Rabies Vaccine.
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=184 Participants
This includes all participants in the Normal Risk Group (NRG) receiving Human Rabies Immune Globulin (HRIG)+Rabies Vaccine.
Total
n=447 Participants
Total of all reporting groups
Age, Continuous
38.0 years
STANDARD_DEVIATION 14.26 • n=9 Participants
38.4 years
STANDARD_DEVIATION 13.73 • n=6 Participants
31.9 years
STANDARD_DEVIATION 11.33 • n=9 Participants
31.3 years
STANDARD_DEVIATION 12.49 • n=17 Participants
34.9 years
STANDARD_DEVIATION 12.95 • n=16 Participants
Sex: Female, Male
Female
24 Participants
n=9 Participants
18 Participants
n=6 Participants
85 Participants
n=9 Participants
84 Participants
n=17 Participants
211 Participants
n=16 Participants
Sex: Female, Male
Male
21 Participants
n=9 Participants
17 Participants
n=6 Participants
98 Participants
n=9 Participants
100 Participants
n=17 Participants
236 Participants
n=16 Participants
Race/Ethnicity, Customized
Asian
45 Participants
n=9 Participants
35 Participants
n=6 Participants
183 Participants
n=9 Participants
184 Participants
n=17 Participants
447 Participants
n=16 Participants
Race/Ethnicity, Customized
Hispanic or Latino
0 Participants
n=9 Participants
0 Participants
n=6 Participants
0 Participants
n=9 Participants
2 Participants
n=17 Participants
2 Participants
n=16 Participants
Race/Ethnicity, Customized
Not Hispanic or Latino
45 Participants
n=9 Participants
35 Participants
n=6 Participants
183 Participants
n=9 Participants
182 Participants
n=17 Participants
445 Participants
n=16 Participants
Region of Enrollment
Philippines
45 participants
n=9 Participants
35 participants
n=6 Participants
183 participants
n=9 Participants
184 participants
n=17 Participants
447 participants
n=16 Participants
BMI
24.70 kg/m^2
STANDARD_DEVIATION 4.612 • n=9 Participants
23.66 kg/m^2
STANDARD_DEVIATION 4.732 • n=6 Participants
23.89 kg/m^2
STANDARD_DEVIATION 4.787 • n=9 Participants
23.69 kg/m^2
STANDARD_DEVIATION 4.573 • n=17 Participants
24.25 kg/m^2
STANDARD_DEVIATION 4.664 • n=16 Participants

PRIMARY outcome

Timeframe: Day 8

Population: The primary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. The per-protocol population included all as-treated subjects without any major protocol deviation who had met all inclusion/exclusion criteria and received complete study treatment.

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT).

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=31 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=153 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=156 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Rabies Virus Neutralizing Activity (RVNA) of Geometric Mean Concentration (GMC) at Study Day 8
4.70 IU/mL
Geometric Coefficient of Variation 0.37
0.13 IU/mL
Geometric Coefficient of Variation 0.10
3.30 IU/mL
Geometric Coefficient of Variation 0.61
0.17 IU/mL
Geometric Coefficient of Variation 1.39

PRIMARY outcome

Timeframe: Day 99

Population: The primary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. Per-protocol population: all subjects who were randomly assigned, received the correct study drug, met inclusion/exclusion criteria, completed all rabies scheduled vaccinations, lacked major protocol deviations, had adequate wound treatment and study drug injection of all exposure sites.

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT).

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=31 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=153 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=152 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Rabies Virus Neutralizing Activity (RVNA) of Geometric Mean Concentration (GMC) at Study Day 99
0.66 IU/mL
Geometric Coefficient of Variation 1.13
1.72 IU/mL
Geometric Coefficient of Variation 1.83
0.97 IU/mL
Geometric Coefficient of Variation 1.21
1.47 IU/mL
Geometric Coefficient of Variation 1.60

PRIMARY outcome

Timeframe: Day 99

Population: The primary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. Per-protocol population: all subjects who were randomly assigned, received the correct study drug, met inclusion/exclusion criteria, completed all rabies scheduled vaccinations, lacked major protocol deviations, had adequate wound treatment and study drug injection of all exposure sites.

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT).

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=31 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=156 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Percentage of Participants With Rabies Virus Neutralizing Activity (RVNA) ≥0.5 IU/mL at Study Day 99
30 Participants
28 Participants
138 Participants
142 Participants

PRIMARY outcome

Timeframe: Day 1 to Day 365

Population: The primary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. Per-protocol population: all subjects who were randomly assigned, received the correct study drug, met inclusion/exclusion criteria, completed all rabies scheduled vaccinations, lacked major protocol deviations, had adequate wound treatment and study drug injection of all exposure sites.

Case Classification Human Rabies * Suspected: A case that is compatible with the clinical case definition * Probable: A suspected case (above) plus history of contact with a suspected rabid animal. * Confirmed: A suspected case that is laboratory-confirmed.

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=31 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=156 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Number of Probable or Confirmed Rabies Cases
0 participants
0 participants
0 participants
0 participants

SECONDARY outcome

Timeframe: Day 4

Population: The secondary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. Per-protocol population: all subjects who were randomly assigned, received the correct study drug, met inclusion/exclusion criteria, completed all rabies scheduled vaccinations, lacked major protocol deviations, had adequate wound treatment and study drug injection of all exposure sites.

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT).

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=30 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=156 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Rabies Virus Neutralizing Activity (RVNA) of Geometric Mean Concentration (GMC) at Study Day 4
3.30 IU/mL
Geometric Coefficient of Variation 1.27
0.12 IU/mL
Geometric Coefficient of Variation 0.36
3.30 IU/mL
Geometric Coefficient of Variation 0.60
0.14 IU/mL
Geometric Coefficient of Variation 0.82

SECONDARY outcome

Timeframe: Day 1 to Day 15

Population: The secondary efficacy analyses were performed and summarized for the for the Normal Risk Group per-protocol population. Results for the Low Risk Group per-protocol population are only presented in-text tables. Per-protocol population: all subjects who were randomly assigned, received the correct study drug, met inclusion/exclusion criteria, completed all rabies scheduled vaccinations, lacked major protocol deviations, had adequate wound treatment and study drug injection of all exposure sites.

Rabies Virus Neutralizing Activity (RVNA) was assessed using Rapid Fluorescent Focus Inhibition Test (RFFIT). Area Under the Efficacy Curve for the GMC of RVNA from Study Day 1 to Day 15 after administration (AUEC1-15)

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=31 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=156 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Area Under the Efficacy Curve for the Geometric Mean Concentration (GMC) of Rabies Virus Neutralizing Activity (RVNA)
42.91 day.IU/mL
Geometric Coefficient of Variation 0.44
5.79 day.IU/mL
Geometric Coefficient of Variation 1.43
46.00 day.IU/mL
Geometric Coefficient of Variation 0.57
9.81 day.IU/mL
Geometric Coefficient of Variation 2.29

SECONDARY outcome

Timeframe: Day 1 to Day 99

Population: The pharmacokinetics of SYN023 was analyzed in the LRG and NRG per-protocol population. No detectable and quantifiable levels of CTB011 and CTB012 were observed in human rabies immune globulin groups, so no PK or statistical analysis was planned.

The Cmax of CTB011 and CTB012 derived from non-compartmental analysis.

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Maximum Observed Serum Concentration (Cmax)
Cmax for CTB011
903 ng/mL
Geometric Coefficient of Variation 23.8
700 ng/mL
Geometric Coefficient of Variation 25.9
Maximum Observed Serum Concentration (Cmax)
Cmax for CTB012
916.5 ng/mL
Geometric Coefficient of Variation 31.3
628 ng/mL
Geometric Coefficient of Variation 32.6

SECONDARY outcome

Timeframe: Day 1 to Day 99

Population: The pharmacokinetics of SYN023 was analyzed in the LRG and NRG per-protocol population. No detectable and quantifiable levels of CTB011 and CTB012 were observed in human rabies immune globulin groups, so no PK or statistical analysis was planned.

The Tmax of CTB011 and CTB012 derived from non-compartmental analysis.

Outcome measures

Outcome measures
Measure
Low Risk Group: SYN023+Rabies Vaccine
n=40 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Low Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
n=154 Participants
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
Normal Risk Group: SYN023+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Normal Risk Group: Human Rabies Immune Globulin (HRIG)+Rabies Vaccine
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Time of Maximum Observed Serum Concentration (Tmax)
Tmax for CTB011
2.93 day
Full Range 0.23 • Interval 2.58 to 14.15
2.89 day
Full Range 0.34 • Interval 2.6 to 13.96
Time of Maximum Observed Serum Concentration (Tmax)
Tmax for CTB012
2.87 day
Full Range 0.34 • Interval 2.58 to 14.02
2.89 day
Full Range 0.34 • Interval 2.6 to 13.93

Adverse Events

LRG: SYN023+Rabies Vaccine

Serious events: 0 serious events
Other events: 9 other events
Deaths: 0 deaths

LRG: HRIG+Rabies Vaccine

Serious events: 1 serious events
Other events: 11 other events
Deaths: 1 deaths

NRG: SYN023+Rabies Vaccine

Serious events: 1 serious events
Other events: 40 other events
Deaths: 0 deaths

NRG: HRIG+Rabies Vaccine

Serious events: 2 serious events
Other events: 30 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
LRG: SYN023+Rabies Vaccine
n=45 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
LRG: HRIG+Rabies Vaccine
n=35 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
NRG: SYN023+Rabies Vaccine
n=183 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
NRG: HRIG+Rabies Vaccine
n=184 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
Breast cancer recurrent
0.00%
0/45 • 365 days
2.9%
1/35 • Number of events 1 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Pregnancy, puerperium and perinatal conditions
Ruptured ectopic pregnancy
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • Number of events 1 • 365 days
0.00%
0/184 • 365 days
Infections and infestations
Leptospirosis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • Number of events 1 • 365 days
Nervous system disorders
Cerebrovascular accident
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • Number of events 1 • 365 days

Other adverse events

Other adverse events
Measure
LRG: SYN023+Rabies Vaccine
n=45 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
LRG: HRIG+Rabies Vaccine
n=35 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). Bites to the head, neck, genitalia arm or hand are not included in the LRG. The initial 20 subjects in the LRG were to be randomized on a 3:1 (SYN023 to Human Rabies Immune Globulin (HRIG)) ratio. The general 60 subjects in the LRG were to be allocated with a 1:1 randomization to either SYN023 or HRIG treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: Initial LRG subjects received 4 vaccine doses (Days 1, 4, 8,15); General LRG subjects received 5 vaccine doses (Days 1, 4, 8, 15, and 29).
NRG: SYN023+Rabies Vaccine
n=183 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. SYN023: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 0.3 mg/kg of SYN023 * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
NRG: HRIG+Rabies Vaccine
n=184 participants at risk
The subjects were enrolled in the study sequentially into 2 different risk substrata of WHO Category 3 rabies exposure, which included Low Risk Group (LRG) and Normal Risk Group (NRG). The NRG were consisted of all WHO Category 3 exposure. Subjects were to be allocated with a 1:1 randomization to either SYN023 or Human Rabies Immune Globulin (HRIG) treatment arms. HRIG: * Interventions: are administered by direct injection into the wound or by subcutaneous or intramuscular injection when this is not possible * Dosage: 20 IU/kg * Frequency/duration: at Day 1 Rabies vaccine: * Interventions: should be administered in deltoid muscle * Dosage: 1 mL after reconstitution * Frequency/duration: at Day 1, 4, 8, 15, 29
Immune system disorders
Allergy to arthropod bite
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Infections and infestations
Upper respiratory tract infection
2.2%
1/45 • 365 days
11.4%
4/35 • 365 days
1.1%
2/183 • 365 days
2.2%
4/184 • 365 days
Infections and infestations
Urinary tract infection
4.4%
2/45 • 365 days
0.00%
0/35 • 365 days
2.7%
5/183 • 365 days
1.1%
2/184 • 365 days
Infections and infestations
Nasopharyngitis
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
1.6%
3/183 • 365 days
0.00%
0/184 • 365 days
Infections and infestations
Herpes zoster
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Infections and infestations
Nail infection
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Infections and infestations
Parasitic gastroenteritis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Infections and infestations
Pyelonephritis acute
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Infections and infestations
Rhinitis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Infections and infestations
Viral rash
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Injury, poisoning and procedural complications
Limb injury
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Injury, poisoning and procedural complications
Muscle strain
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Injury, poisoning and procedural complications
Fall
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Injury, poisoning and procedural complications
Foreign body in eye
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Injury, poisoning and procedural complications
Road traffic accident
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Alanine aminotransferase increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.6%
3/183 • 365 days
1.6%
3/184 • 365 days
Investigations
Eosinophil count increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
3.3%
6/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Blood alkaline phosphatase increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.6%
3/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Aspartate aminotransferase increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.1%
2/183 • 365 days
0.00%
0/184 • 365 days
Investigations
White blood cell count increased
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Investigations
Activated partial thromboplastin time prolonged
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Blood creatinine increased
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Blood potassium increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Investigations
Blood urea increased
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Differential white blood cell count abnormal
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Investigations
Haemoglobin decreased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Investigations
Hepatic enzyme increased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Investigations
Neutrophil count decreased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Investigations
White blood cell count decreased
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Metabolism and nutrition disorders
Glucose tolerance impaired
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Metabolism and nutrition disorders
Hypokalaemia
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Musculoskeletal and connective tissue disorders
Arthralgia
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Musculoskeletal and connective tissue disorders
Gouty arthritis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Musculoskeletal and connective tissue disorders
Limb discomfort
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Musculoskeletal and connective tissue disorders
Pain in extremity
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Nervous system disorders
Headache
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
2.7%
5/183 • 365 days
2.7%
5/184 • 365 days
Nervous system disorders
Dizziness
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Renal and urinary disorders
Calculus urinary
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Renal and urinary disorders
Proteinuria
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Reproductive system and breast disorders
Dysfunctional uterine bleeding
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Reproductive system and breast disorders
Vaginal haemorrhage
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Respiratory, thoracic and mediastinal disorders
Cough
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.54%
1/184 • 365 days
Respiratory, thoracic and mediastinal disorders
Allergic cough
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Respiratory, thoracic and mediastinal disorders
Rhinitis allergic
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Dermatitis atopic
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.1%
2/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Dyshidrotic eczema
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Erythema
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Rash macular
0.00%
0/45 • 365 days
2.9%
1/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Skin induration
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Vascular disorders
Haematoma
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Vascular disorders
Vasculitis
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
General disorders
Chills
4.4%
2/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Musculoskeletal and connective tissue disorders
Myalgia
2.2%
1/45 • 365 days
2.9%
1/35 • 365 days
1.6%
3/183 • 365 days
1.6%
3/184 • 365 days
Skin and subcutaneous tissue disorders
Pruritus
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.1%
2/183 • 365 days
0.00%
0/184 • 365 days
Skin and subcutaneous tissue disorders
Rash
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
General disorders
Pyrexia
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Gastrointestinal disorders
Hyperchlorhydria
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
General disorders
Malaise
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
1.6%
3/184 • 365 days
General disorders
Fatigue
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.1%
2/183 • 365 days
0.00%
0/184 • 365 days
General disorders
Injection site haematoma
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
General disorders
Injection site induration
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
General disorders
Injection site pain
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
General disorders
Vaccination site pain
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
General disorders
Vaccination site swelling
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Hepatobiliary disorders
Hepatitis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.54%
1/184 • 365 days
Hepatobiliary disorders
Hepatic steatosis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Hepatobiliary disorders
Liver disorder
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Blood and lymphatic system disorders
Eosinophilia
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
2.7%
5/183 • 365 days
0.00%
0/184 • 365 days
Blood and lymphatic system disorders
Leukocytosis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Cardiac disorders
Sinus tachycardia
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days
Ear and labyrinth disorders
Vertigo positional
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.54%
1/184 • 365 days
Gastrointestinal disorders
Toothache
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
1.1%
2/183 • 365 days
0.54%
1/184 • 365 days
Gastrointestinal disorders
Aphthous ulcer
2.2%
1/45 • 365 days
0.00%
0/35 • 365 days
0.00%
0/183 • 365 days
0.00%
0/184 • 365 days
Gastrointestinal disorders
Gastritis
0.00%
0/45 • 365 days
0.00%
0/35 • 365 days
0.55%
1/183 • 365 days
0.00%
0/184 • 365 days

Additional Information

Ariel Chuang / Director

Synermore Biologics Co., Ltd.

Phone: +886 22659 0988

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place