Trial Outcomes & Findings for Study With Quadrivalent Recombinant Influenza Vaccine (RIV4) in Participants 9 Through 49 Years of Age. (NCT NCT05513053)

NCT ID: NCT05513053

Last Updated: 2025-09-09

Results Overview

GMTs of anti-influenza antibodies were measured using individual hemagglutination inhibition (HAI) assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages.

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

1308 participants

Primary outcome timeframe

Day 29

Results posted on

2025-09-09

Participant Flow

This study was conducted at 36 investigational sites in 4 countries between 27 Oct 2022 to 27 Oct 2023.

A total of 1308 participants were enrolled in this study.

Participant milestones

Participant milestones
Measure
Cohort 1: Participants Aged 9 to 17 Years
Participants received a single intramuscular (IM) injection of RIV4 0.5 milliliter (mL) on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Overall Study
STARTED
648
660
Overall Study
COMPLETED
629
635
Overall Study
NOT COMPLETED
19
25

Reasons for withdrawal

Reasons for withdrawal
Measure
Cohort 1: Participants Aged 9 to 17 Years
Participants received a single intramuscular (IM) injection of RIV4 0.5 milliliter (mL) on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Overall Study
Lost to Follow-up
9
11
Overall Study
Withdrawal by parent/guardian
2
0
Overall Study
Withdrawal by Subject
2
9
Overall Study
Protocol Violation
6
3
Overall Study
Adverse Event
0
2

Baseline Characteristics

Study With Quadrivalent Recombinant Influenza Vaccine (RIV4) in Participants 9 Through 49 Years of Age.

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=648 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=660 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Total
n=1308 Participants
Total of all reporting groups
Age, Continuous
13.0 years
STANDARD_DEVIATION 2.49 • n=5 Participants
34.3 years
STANDARD_DEVIATION 9.21 • n=7 Participants
23.7 years
STANDARD_DEVIATION 12.6 • n=5 Participants
Sex: Female, Male
Female
312 Participants
n=5 Participants
395 Participants
n=7 Participants
707 Participants
n=5 Participants
Sex: Female, Male
Male
336 Participants
n=5 Participants
265 Participants
n=7 Participants
601 Participants
n=5 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
5 Participants
n=5 Participants
1 Participants
n=7 Participants
6 Participants
n=5 Participants
Race/Ethnicity, Customized
Asian
1 Participants
n=5 Participants
6 Participants
n=7 Participants
7 Participants
n=5 Participants
Race/Ethnicity, Customized
Black or African American
157 Participants
n=5 Participants
98 Participants
n=7 Participants
255 Participants
n=5 Participants
Race/Ethnicity, Customized
Native Hawaiian or Other Pacific Islander
1 Participants
n=5 Participants
3 Participants
n=7 Participants
4 Participants
n=5 Participants
Race/Ethnicity, Customized
White
467 Participants
n=5 Participants
536 Participants
n=7 Participants
1003 Participants
n=5 Participants
Race/Ethnicity, Customized
Not Reported
0 Participants
n=5 Participants
2 Participants
n=7 Participants
2 Participants
n=5 Participants
Race/Ethnicity, Customized
Unknown
1 Participants
n=5 Participants
1 Participants
n=7 Participants
2 Participants
n=5 Participants
Race/Ethnicity, Customized
Multiple
16 Participants
n=5 Participants
13 Participants
n=7 Participants
29 Participants
n=5 Participants

PRIMARY outcome

Timeframe: Day 29

Population: Analysis was performed on the Per-protocol analysis set (PPAS)-subset of full analysis set (FAS) which included participants who received 1 dose of the study vaccine and had a post-vaccination blood sample.

GMTs of anti-influenza antibodies were measured using individual hemagglutination inhibition (HAI) assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=609 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=606 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Geometric Mean Titers (GMTs) Against Influenza Vaccine Antibodies at Day 29
A/H1N1
1946 titer
Interval 1795.0 to 2109.0
982 titer
Interval 881.0 to 1094.0
Geometric Mean Titers (GMTs) Against Influenza Vaccine Antibodies at Day 29
A/H3N2
1975 titer
Interval 1771.0 to 2202.0
604 titer
Interval 531.0 to 687.0
Geometric Mean Titers (GMTs) Against Influenza Vaccine Antibodies at Day 29
B/Victoria
405 titer
Interval 362.0 to 452.0
258 titer
Interval 233.0 to 285.0
Geometric Mean Titers (GMTs) Against Influenza Vaccine Antibodies at Day 29
B/Yamagata
1941 titer
Interval 1779.0 to 2118.0
1593 titer
Interval 1477.0 to 1717.0

PRIMARY outcome

Timeframe: Day 29

Population: Analysis was performed on the PPAS-subset of FAS which included participants who received 1 dose of the study vaccine and had a post-vaccination blood sample. Only participants with data collected for each category at Day 29 are reported.

Anti-influenza antibodies were measured using HAI assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages. Seroconversion was defined as either a pre-vaccination titer less than (\<) 1:10 (1/dilution) at Day 1 and a post-vaccination titer greater than or equal to (\>=) 1: 40 (1/dilution) at Day 29 or a pre-vaccination titer \>= 1:10 at Day 1 and a \>= 4-fold increase in post-vaccination titer.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=609 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=606 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Percentage of Participants With Seroconversion for Influenza Vaccine Antibodies at Day 29
A/H1N1
78.3 percentage of participants
Interval 74.8 to 81.5
76.4 percentage of participants
Interval 72.8 to 79.7
Percentage of Participants With Seroconversion for Influenza Vaccine Antibodies at Day 29
A/H3N2
86.5 percentage of participants
Interval 83.6 to 89.1
87.1 percentage of participants
Interval 84.2 to 89.7
Percentage of Participants With Seroconversion for Influenza Vaccine Antibodies at Day 29
B/Victoria
76.8 percentage of participants
Interval 73.3 to 80.1
73.6 percentage of participants
Interval 69.8 to 77.0
Percentage of Participants With Seroconversion for Influenza Vaccine Antibodies at Day 29
B/Yamagata
77.2 percentage of participants
Interval 73.6 to 80.5
62.9 percentage of participants
Interval 58.9 to 66.7

SECONDARY outcome

Timeframe: Pre-vaccination on Day 1

Population: Analysis was performed on the PPAS-subset of FAS which included participants who received 1 dose of the study vaccine and had a post-vaccination blood sample. Only participants with data collected for each category at Day 1 are reported.

GMTs of anti-influenza antibodies were measured using HAI assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=609 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=606 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
GMTs Against Influenza Vaccine Antibodies at Day 1
A/H1N1
154 titer
Interval 137.0 to 173.0
74.9 titer
Interval 65.8 to 85.1
GMTs Against Influenza Vaccine Antibodies at Day 1
A/H3N2
111 titer
Interval 95.4 to 128.0
29.0 titer
Interval 25.7 to 32.8
GMTs Against Influenza Vaccine Antibodies at Day 1
B/Victoria
48.1 titer
Interval 43.0 to 53.8
37.3 titer
Interval 34.0 to 40.9
GMTs Against Influenza Vaccine Antibodies at Day 1
B/Yamagata
272 titer
Interval 243.0 to 305.0
300 titer
Interval 269.0 to 335.0

SECONDARY outcome

Timeframe: On Days 1 and 29

Population: Analysis was performed on the PPAS-subset of FAS which included participants who received 1 dose of the study vaccine and had a post-vaccination blood sample. Only participants with data collected for each category on Days 1 and 29 are reported.

Antibody titers were measured using HAI assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages. Percentage of participants with antibody titers \>=10 and \>=40 against influenza vaccine antibodies at Day 1 and Day 29 were reported in this outcome measure.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=609 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=606 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: A/H1N1: Day 1
97.0 percentage of participants
Interval 95.4 to 98.2
89.8 percentage of participants
Interval 87.1 to 92.1
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: A/H1N1: Day 29
100 percentage of participants
Interval 99.4 to 100.0
99.3 percentage of participants
Interval 98.3 to 99.8
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: A/H1N1: Day 1
87.2 percentage of participants
Interval 84.3 to 89.7
71.8 percentage of participants
Interval 68.0 to 75.3
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: A/H1N1: Day 29
99.7 percentage of participants
Interval 98.8 to 100.0
97.5 percentage of participants
Interval 96.0 to 98.6
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: A/H3N2: Day 1
89.2 percentage of participants
Interval 86.4 to 91.5
77.7 percentage of participants
Interval 74.2 to 81.0
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: A/H3N2: Day 29
100 percentage of participants
Interval 99.4 to 100.0
99.7 percentage of participants
Interval 98.8 to 100.0
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: A/H3N2: Day 1
74.7 percentage of participants
Interval 71.1 to 78.1
45.0 percentage of participants
Interval 41.0 to 49.1
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: A/H3N2: Day 29
99.0 percentage of participants
Interval 97.9 to 99.6
95.0 percentage of participants
Interval 93.0 to 96.6
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: B/Victoria: Day 1
92.1 percentage of participants
Interval 89.7 to 94.1
91.7 percentage of participants
Interval 89.2 to 93.8
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: B/Victoria: Day 29
99.5 percentage of participants
Interval 98.6 to 99.9
99.8 percentage of participants
Interval 99.1 to 100.0
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: B/Victoria: Day 1
61.4 percentage of participants
Interval 57.4 to 65.3
59.8 percentage of participants
Interval 55.8 to 63.8
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: B/Victoria: Day 29
95.6 percentage of participants
Interval 93.6 to 97.1
97.0 percentage of participants
Interval 95.3 to 98.2
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: B/Yamagata: Day 1
97.9 percentage of participants
Interval 96.4 to 98.9
99.5 percentage of participants
Interval 98.6 to 99.9
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=10: B/Yamagata: Day 29
100 percentage of participants
Interval 99.4 to 100.0
100 percentage of participants
Interval 99.4 to 100.0
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: B/Yamagata: Day 1
93.1 percentage of participants
Interval 90.8 to 95.0
95.2 percentage of participants
Interval 93.2 to 96.8
Percentage of Participants With Detectable HAI Titers >=10 and >=40 for Influenza Vaccine Antibodies at Days 1 and 29
Titer >=40: B/Yamagata: Day 29
99.5 percentage of participants
Interval 98.6 to 99.9
100 percentage of participants
Interval 99.4 to 100.0

SECONDARY outcome

Timeframe: On Days 1 and 29

Population: Analysis was performed on the PPAS-subset of FAS which included participants who received 1 dose of the study vaccine and had a post-vaccination blood sample. Only participants with data collected for each category on Days 1 and Day 29 are reported.

GMTR was the ratio of the individual titers post-vaccination over pre-vaccination. The GMTs were measured using HAI assay for 4 influenza virus strains: A/H1N1, A/H3N2, B/Victoria, and B/Yamagata lineages.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=609 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=606 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Geometric Mean Titer Ratio (GMTR) of Influenza Vaccine Antibodies
A/H3N2
17.9 ratio
Interval 15.7 to 20.3
20.8 ratio
Interval 18.4 to 23.6
Geometric Mean Titer Ratio (GMTR) of Influenza Vaccine Antibodies
A/H1N1
12.7 ratio
Interval 11.1 to 14.5
13.1 ratio
Interval 11.4 to 15.0
Geometric Mean Titer Ratio (GMTR) of Influenza Vaccine Antibodies
B/Victoria
8.41 ratio
Interval 7.55 to 9.37
6.91 ratio
Interval 6.25 to 7.64
Geometric Mean Titer Ratio (GMTR) of Influenza Vaccine Antibodies
B/Yamagata
7.13 ratio
Interval 6.46 to 7.87
5.31 ratio
Interval 4.79 to 5.88

SECONDARY outcome

Timeframe: Within 30 minutes post-vaccination on Day 1

Population: Analysis was performed on the Safety analysis set which included participants who received 1 dose of the study vaccine.

An AE was any untoward medical occurrence in a clinical investigation participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE was an observed AE that did not fulfill the conditions of solicited reactions, that is, prelisted in the CRF in terms of diagnosis and/or onset window post-vaccination. All participants were observed for 30 minutes after vaccination, and any unsolicited AEs occurred during that time were recorded as immediate unsolicited AEs.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Number of Participants With Immediate Unsolicited Adverse Events (AEs)
1 Participants
0 Participants

SECONDARY outcome

Timeframe: From Day 1 up to 7 days post-vaccination (up to Day 8)

Population: Analysis was performed on the Safety analysis set which included participants who received 1 dose of the study vaccine. Number of participants analyzed signifies those participants with data collected for this outcome measure and number analyzed signifies those participants with data collected for specified category.

A solicited reaction was an expected adverse reaction (sign or symptom) observed and reported under the conditions (nature and onset) prelisted in the protocol and CRF and considered as related to the study intervention administered. An injection site reaction was an AR at and around the injection site and were commonly inflammatory reactions. Solicited systemic reactions were systemic AEs and those occurring during the specified collection period were always considered related to the intervention even if there was evidence of alternative etiology.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=618 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=635 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Number of Participants With Solicited Injection Site Reactions and Systemic Reactions
Solicited injection site reaction
220 Participants
259 Participants
Number of Participants With Solicited Injection Site Reactions and Systemic Reactions
Solicited systemic reaction
182 Participants
230 Participants

SECONDARY outcome

Timeframe: From Day 1 up to 28 days post-vaccination (up to Day 29)

Population: Analysis was performed on the Safety analysis set which included participants who received 1 dose of the study vaccine.

An AE was any untoward medical occurrence in a clinical investigation participant temporally associated with the use of study intervention, whether or not considered related to the study intervention. An unsolicited AE was an observed AE that did not fulfill the conditions of solicited reactions, that is, prelisted in the CRF in terms of diagnosis and/or onset window post-vaccination.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Number of Participants With Unsolicited AEs
93 Participants
119 Participants

SECONDARY outcome

Timeframe: From Day 1 up to 28 days post-vaccination (up to Day 29)

Population: Analysis was performed on the Safety analysis set which included participants who received 1 dose of the study vaccine.

An MAAE was a new onset or a worsening of a condition that prompted the participant or participant's parent/guardian to seek unplanned medical advice at a physician's office or emergency department.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Number of Participants With Medically Attended Adverse Events (MAAEs)
27 Participants
35 Participants

SECONDARY outcome

Timeframe: From Day 1 up to 6 months post-vaccination, 181 days

Population: Analysis was performed on the Safety analysis set which included participants who received 1 dose of the study vaccine.

An SAE was any untoward medical occurrence that at any dose resulted in death, was life-threatening, required inpatient hospitalization or prolongation of existing hospitalization, resulted in persistent or significant disability/incapacity, was a congenital anomaly/birth defect, or was an important medical event. An AESI was defined as one of scientific and medical concern specific to the Sponsor's study intervention, events for which ongoing monitoring and rapid communication by the investigator to the sponsor was done.

Outcome measures

Outcome measures
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 Participants
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Number of Participants With Serious Adverse Events (SAEs) And Adverse Events of Special Interest (AESI)
SAE
3 Participants
7 Participants
Number of Participants With Serious Adverse Events (SAEs) And Adverse Events of Special Interest (AESI)
AESI
0 Participants
0 Participants

Adverse Events

Cohort 1: Participants Aged 9 to 17 Years

Serious events: 3 serious events
Other events: 263 other events
Deaths: 0 deaths

Cohort 2: Participants Aged 18 to 49 Years

Serious events: 7 serious events
Other events: 336 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 participants at risk
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 participants at risk
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Injury, poisoning and procedural complications
Intentional Overdose
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Injury, poisoning and procedural complications
Overdose
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Injury, poisoning and procedural complications
Spinal Fracture
0.16%
1/641 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.00%
0/658 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Nervous system disorders
Seizure
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Gastrointestinal disorders
Obstructive Pancreatitis
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Infections and infestations
Kidney Infection
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Neoplasms benign, malignant and unspecified (incl cysts and polyps)
Gastric Cancer Recurrent
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Psychiatric disorders
Major Depression
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Psychiatric disorders
Suicidal Ideation
0.31%
2/641 • Number of events 3 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Respiratory, thoracic and mediastinal disorders
Acute Respiratory Failure
0.00%
0/641 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
0.15%
1/658 • Number of events 1 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.

Other adverse events

Other adverse events
Measure
Cohort 1: Participants Aged 9 to 17 Years
n=641 participants at risk
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Cohort 2: Participants Aged 18 to 49 Years
n=658 participants at risk
Participants received a single IM injection of RIV4 0.5 mL on Day 1.
Nervous system disorders
Headache
17.8%
114/641 • Number of events 121 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
23.1%
152/658 • Number of events 153 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
Musculoskeletal and connective tissue disorders
Myalgia
18.6%
119/641 • Number of events 119 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
19.6%
129/658 • Number of events 129 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
General disorders
Chills
7.0%
45/641 • Number of events 45 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
6.1%
40/658 • Number of events 40 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
General disorders
Injection Site Pain
33.1%
212/641 • Number of events 212 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
38.8%
255/658 • Number of events 256 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
General disorders
Malaise
15.6%
100/641 • Number of events 100 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.
16.1%
106/658 • Number of events 106 • From Day 1 up to 6 months post-vaccination, 181 days
Analysis was performed on the Safety analysis set.

Additional Information

Trial Transparency Team

Sanofi Pasteur

Phone: 800-633-1610

Results disclosure agreements

  • Principal investigator is a sponsor employee The Sponsor must have the opportunity to review at least 60 days prior to submission for publication or presentation. If review indicates that potentially patentable subject matter would be disclosed, publication or public disclosure may be delayed for a maximum of an additional 60 days to allow for filing the necessary patent applications.
  • Publication restrictions are in place

Restriction type: OTHER