Trial Outcomes & Findings for Safety and Immunogenicity of HIL-214 in Healthy Japanese Infants (NCT NCT06007781)

NCT ID: NCT06007781

Last Updated: 2025-03-14

Results Overview

Percentage of Participants with Adverse Events (AEs) Leading to Trial Withdrawal

Recruitment status

COMPLETED

Study phase

PHASE1

Target enrollment

21 participants

Primary outcome timeframe

Day 1 to 6 months post-dose 2

Results posted on

2025-03-14

Participant Flow

Participants took part in the trial at 4 investigative sites in Japan from 18 August 2023 to 27 May 2024

Participants were enrolled in 1 of 2 treatment arms and received 2 doses of either HIL-214, a norovirus vaccine comprising 50 µg GI.1 virus-like particle (VLP) and 150 µg GII.4c VLP, adjuvanted with 500 µg of aluminum hydroxide, or placebo.

Participant milestones

Participant milestones
Measure
Placebo
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Overall Study
STARTED
7
14
Overall Study
COMPLETED
7
14
Overall Study
NOT COMPLETED
0
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Safety and Immunogenicity of HIL-214 in Healthy Japanese Infants

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Total
n=21 Participants
Total of all reporting groups
Age, Continuous
152.9 days
STANDARD_DEVIATION 7.60 • n=5 Participants
150.9 days
STANDARD_DEVIATION 7.72 • n=7 Participants
151.6 days
STANDARD_DEVIATION 7.55 • n=5 Participants
Sex: Female, Male
Female
3 Participants
n=5 Participants
7 Participants
n=7 Participants
10 Participants
n=5 Participants
Sex: Female, Male
Male
4 Participants
n=5 Participants
7 Participants
n=7 Participants
11 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
7 Participants
n=5 Participants
14 Participants
n=7 Participants
21 Participants
n=5 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
7 Participants
n=5 Participants
14 Participants
n=7 Participants
21 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
White
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Region of Enrollment
Japan
7 participants
n=5 Participants
14 participants
n=7 Participants
21 participants
n=5 Participants
Weight
7.23 kg
STANDARD_DEVIATION 0.596 • n=5 Participants
7.31 kg
STANDARD_DEVIATION 0.815 • n=7 Participants
7.29 kg
STANDARD_DEVIATION 0.735 • n=5 Participants
Length
63.96 cm
STANDARD_DEVIATION 1.936 • n=5 Participants
64.27 cm
STANDARD_DEVIATION 2.083 • n=7 Participants
64.17 cm
STANDARD_DEVIATION 1.992 • n=5 Participants
Head circumference
41.86 cm
STANDARD_DEVIATION 1.282 • n=5 Participants
41.66 cm
STANDARD_DEVIATION 1.873 • n=7 Participants
41.73 cm
STANDARD_DEVIATION 1.668 • n=5 Participants

PRIMARY outcome

Timeframe: Day 1 to 6 months post-dose 2

Population: Safety Analysis Set, all participants that received trial vaccine (HIL 214 or placebo).

Percentage of Participants with Adverse Events (AEs) Leading to Trial Withdrawal

Outcome measures

Outcome measures
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Safety of HIL-214 Compared to Placebo - AEs Leading to Trial Withdrawal
0 Percentage of Participants
0 Percentage of Participants

PRIMARY outcome

Timeframe: Day 1 to Day 7 post-dose 1 and Day 1 to Day 7 post-dose 2 (Day 36 to Day 56)

Population: Safety Analysis Set, all participants that received trial vaccine (HIL 214 or placebo).

Percentage of Participants with Solicited Local (Injection Site) Adverse Events (AEs) Within 7 Days of Vaccine Administration (any dose). Assessed AEs included pain, erythema, induration, and swelling.

Outcome measures

Outcome measures
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Safety of HIL-214 Compared to Placebo - Solicited Local Adverse Events
Erythema
0 Percentage of Participants
14.3 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Local Adverse Events
Induration
0 Percentage of Participants
14.3 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Local Adverse Events
Swelling
0 Percentage of Participants
14.3 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Local Adverse Events
Any solicited local AE
0 Percentage of Participants
42.9 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Local Adverse Events
Pain
0 Percentage of Participants
14.3 Percentage of Participants

PRIMARY outcome

Timeframe: Day 1 to Day 7 post-dose 1 and Day 1 to Day 7 post-dose 2 (Day 36 to Day 56)

Population: Safety Analysis Set, all participants that received trial vaccine (HIL 214 or placebo).

Percentage of Participants with Solicited Systemic Adverse Events (AEs) Within 7 Days of Vaccine Administration. Assessed AEs included drowsiness, irritability/fussiness, loss of appetite, fever, vomiting, and diarrhea.

Outcome measures

Outcome measures
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Loss of appetite
0 Percentage of Participants
21.4 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Fever
0 Percentage of Participants
7.1 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Vomiting
0 Percentage of Participants
21.4 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Any solicited systemic AE
14.3 Percentage of Participants
64.3 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Drowsiness
14.3 Percentage of Participants
35.7 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Irritability/fussiness
0 Percentage of Participants
35.7 Percentage of Participants
Safety of HIL-214 Compared to Placebo - Solicited Systemic Adverse Events
Diarrhea
0 Percentage of Participants
35.7 Percentage of Participants

PRIMARY outcome

Timeframe: Up to 56 days post-dose 1

Population: Safety Analysis Set, all participants that received trial vaccine (HIL 214 or placebo).

Percentage of participants with AEs that lead to withdrawal of trial vaccine up to the planned time of second dose administration.

Outcome measures

Outcome measures
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Safety of HIL-214 Compared to Placebo - Percentage of Participants With AEs Leading to Vaccine Withdrawal
0 Percentage of Participants
0 Percentage of Participants

SECONDARY outcome

Timeframe: Day 1 to 6 months post-dose 2

Population: Per-Protocol Set, all participants who received trial vaccine (HIL-214 or placebo) and had no major protocol deviations.

The percentage of participants with a predefined seroresponse (≥4-fold rise in antibody concentration) at Visit 2, Visit 3, and/or Visit 4 to the GI.1 and GII.4c components of HIL-214 and 95% confidence interval are reported. HBGA-blocking and pan-Ig assays were used for immunogenicity analyses.

Outcome measures

Outcome measures
Measure
Placebo
n=7 Participants
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=13 Participants
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 HBGA-blocking seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
87.5 Percentage of Participants
Interval 47.3 to 99.7
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 HBGA-blocking seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 73.5 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 HBGA-blocking seroresponse rate at Visit 4
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 73.5 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GII.4c HBGA-blocking seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
23.1 Percentage of Participants
Interval 5.0 to 53.8
Immunogenicity of HIL-214 Compared to Placebo.
Anti- GII.4c HBGA-blocking seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
92.3 Percentage of Participants
Interval 64.0 to 99.8
Immunogenicity of HIL-214 Compared to Placebo.
Anti- GII.4c HBGA-blocking seroresponse rate at Visit 4
28.6 Percentage of Participants
Interval 3.7 to 71.0
84.6 Percentage of Participants
Interval 54.6 to 98.1
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 and GII.4c HBGA-blocking seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
37.5 Percentage of Participants
Interval 8.5 to 75.5
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 and GII.4c HBGA-blocking seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
91.7 Percentage of Participants
Interval 61.5 to 99.8
Immunogenicity of HIL-214 Compared to Placebo.
Anti- GI.1 and GII.4c HBGA-blocking seroresponse rate at Visit 4
0 Percentage of Participants
Interval 0.0 to 41.1
84.6 Percentage of Participants
Interval 54.6 to 98.1
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 pan-Ig seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 75.3 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 pan-Ig seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 75.3 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 pan-Ig seroresponse rate at Visit 4
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 75.3 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GII.4c pan-Ig seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
69.2 Percentage of Participants
Interval 38.6 to 90.9
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GII.4c pan-Ig seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 75.3 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GII.4c pan-Ig seroresponse rate at Visit 4
28.6 Percentage of Participants
Interval 3.7 to 71.0
84.6 Percentage of Participants
Interval 54.6 to 98.1
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 and GII.4c pan-Ig seroresponse rate at Visit 2
0 Percentage of Participants
Interval 0.0 to 41.1
69.2 Percentage of Participants
Interval 38.6 to 90.9
Immunogenicity of HIL-214 Compared to Placebo.
Anti-GI.1 and GII.4c pan-Ig seroresponse rate at Visit 3
0 Percentage of Participants
Interval 0.0 to 41.1
100 Percentage of Participants
Interval 75.3 to 100.0
Immunogenicity of HIL-214 Compared to Placebo.
Anti- GI.1 and GII.4c pan-Ig seroresponse rate at Visit 4
0 Percentage of Participants
Interval 0.0 to 41.1
84.6 Percentage of Participants
Interval 54.6 to 98.1

Adverse Events

Placebo

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

HIL-214

Serious events: 1 serious events
Other events: 14 other events
Deaths: 0 deaths

Serious adverse events

Serious adverse events
Measure
Placebo
n=7 participants at risk
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 participants at risk
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Gastrointestinal disorders
Haematochezia
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Number of events 1 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Infections and infestations
Gastroenteritis norovirus
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Number of events 1 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.

Other adverse events

Other adverse events
Measure
Placebo
n=7 participants at risk
One dose of placebo on Day 1 and one dose of placebo between Day 29 and Day 57
HIL-214
n=14 participants at risk
One dose of HIL-214 on Day 1 and one dose of HIL-214 between Day 29 and Day 57
Infections and infestations
Bronchitis
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Infections and infestations
Conjunctivitis
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
0.00%
0/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Infections and infestations
Croup infectious
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Infections and infestations
Nasopharyngitis
57.1%
4/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
21.4%
3/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Infections and infestations
Upper respiratory tract infection
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
14.3%
2/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Skin and subcutaneous tissue disorders
Dermatitis contact
28.6%
2/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
14.3%
2/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Skin and subcutaneous tissue disorders
Dermatitis diaper
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
0.00%
0/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Skin and subcutaneous tissue disorders
Eczema
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Skin and subcutaneous tissue disorders
Eczema asteatotic
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Skin and subcutaneous tissue disorders
Eczema infantile
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
14.3%
2/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Gastrointestinal disorders
Diarrhea
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
14.3%
2/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Gastrointestinal disorders
Dyspepsia
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
0.00%
0/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Gastrointestinal disorders
Haematochezia
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Gastrointestinal disorders
Vomiting
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
14.3%
2/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Respiratory, thoracic and mediastinal disorders
Upper respiratory tract inflammation
14.3%
1/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Metabolism and nutrition disorders
Decreased appetite
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
Nervous system disorders
Somnolence
0.00%
0/7 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.
7.1%
1/14 • Serious adverse events from Day 1 to 6 months post-dose 2; Unsolicited adverse events from Day 1 to 28 days post-dose 1 and Day 1 to 28 days post-dose 2.

Additional Information

Astrid Borkowski, Chief Medical Officer

HilleVax, Inc.

Phone: +1 (617) 213-6562

Results disclosure agreements

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

Restriction type: OTHER