Phase 3
N=300
A Safety and Immunogenicity Study of IVACFLU-A/H5N1
Avian Influenza
Bottom Line
View on ClinicalTrials.gov: NCT02612909 ↗Enrolled (actual)
300
Serious AEs
1.4%
Results posted
Apr 2019
Primary outcome: Primary: Number and Percentage of Subjects Achieving a Hemagglutination Inhibition (HAI) Titer of ≥1:40 — 0; 0; 0; 0 Participants
Study Design & Population
- Study type
- Interventional
- Phase
- Phase 3
- Interventions
- IVACFLU-A/H5N1 vaccine (Biological); Placebo (Biological)
- Age
- Adult · 18+ yrs
- Sex
- All
- Sponsor
- Institute of Vaccines and Medical Biologicals, Vietnam
- Primary completion
- Aug 2017
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Number and Percentage of Subjects Achieving a Hemagglutination Inhibition (HAI) Titer of ≥1:40 |
0; 0; 0; 0; 1; 0 | — |
| SECONDARY Phase 2: Number and Percentage of Subjects Achieving a Hemagglutination Inhibition (HAI) Titer of ≥1:40 |
0; 0; 0; 0; 42; 56 | — |
| SECONDARY Phase 2: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Hemagglutination Inhibition (HAI) Titer |
0; 57; 70; 0; 88; 93 | — |
| SECONDARY Phase 3: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Hemagglutination Inhibition (HAI) Titer |
0; 150 | — |
| SECONDARY Phase 2: Geometric Mean Hemagglutination Inhibition (HAI) Titer |
5.48; 5.62; 5.68; 5.52; 31.67; 42.16 | — |
| SECONDARY Phase 3: Geometric Mean Hemagglutination Inhibition (HAI) Titer |
5.04; 5.08; 5.20; 27.61 | — |
| SECONDARY Phase 2: Geometric Mean Hemagglutination Inhibition (HAI) Titer Ratio, With Respect to Day 1 |
1.01; 5.64; 7.42; 1.03; 11.15; 10.41 | — |
| SECONDARY Phase 3: Geometric Mean Hemagglutination Inhibition (HAI) Titer Ratio, With Respect to Day 1 |
1.01; 5.31 | — |
| SECONDARY Number and Percentage of Subjects Experiencing Reactogenicity |
22; 83; 87; 19; 409; 52 | — |
| SECONDARY Number and Percentage of Subjects Experiencing Reactogenicity |
22; 83; 87; 19; 409; 52 | — |
| SECONDARY Number and Percentage of Subjects Experiencing Unsolicited Adverse Events (AE) |
21; 20; 24; 16; 73; 3 | — |
| SECONDARY Number and Percentage of Subjects Experiencing Unsolicited Serious Adverse Events (SAE) |
0; 1; 0; 4; 8 | — |
| SECONDARY Phase 2: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Neutralizing Antibody Titer |
0; 21; 26; 0; 57; 63 | — |
| SECONDARY Phase 3: Number and Percentage of Subjects Achieving at Least a 4-fold Increase in Neutralizing Antibody Titer |
0; 114 | — |
| SECONDARY Phase 2: Geometric Mean Neutralizing Antibody Titer |
7.15; 7.10; 7.19; 7.12; 13.78; 29.76 | — |
| SECONDARY Phase 3: Geometric Mean Neutralizing Antibody Titer |
7.07; 7.07; 7.07; 26.16 | — |
| SECONDARY Phase 2: Geometric Mean Neutralizing Antibody Titer Ratio, With Respect to Day 1 |
1.00; 1.94; 2.02; 1.00; 4.19; 3.96 | — |
| SECONDARY Phase 3: Geometric Mean Neutralizing Antibody Titer Ratio, With Respect to Day 1 |
1.00; 3.70 | — |
Summary
The study hypothesis was that two 0.5 mL doses of whole virion monovalent A/H5N1 influenza vaccine (IVACFLU-A/H5N1) adjuvanted with alum would be safe and well tolerated in healthy adults, and that at least one of the two doses tested would be immunogenic in 60% or more of the subjects tested.
Eligibility Criteria
Inclusion Criteria
- Male or female adult 18 through 60 years of age at the enrollment visit.
- Literate (by self-report) and willing to provide written informed consent.
- Healthy adults, as established by the medical history and screening evaluations, including physical examination, capable and willing to complete Diary Cards, and willing to return for all follow-up visits.
- For females able to become pregnant, willing to utilize reliable birth control measures (intrauterine device, hormonal contraception, condoms) through the Day 43 visit.
Exclusion Criteria
- Participation in another clinical trial involving any vaccine or therapy within the previous three months, or planned enrollment in such a trial during the period of this study.
- Received any non-study vaccine within 4 weeks prior to enrollment or refused to postpone receipt of such vaccines until after the Day 43 visit.
- Current or recent (within 2 weeks of enrollment) acute illness with or without fever.
- Received immune globulin or other blood products within 3 months prior to study enrollment or planned receipt of such products prior to the Day 43 visit.
- Chronic administration (defined as more than 14 consecutively-prescribed days) of immunosuppressants or other immune-modulating therapy within six months prior to study enrollment. (For corticosteroids, this meant prednisone or equivalent, 0.5 mg per kg per day; topical or intranasal steroids were allowed.)
- History of asthma.
- Hypersensitivity after previous administration of any vaccine.
- Suspected or known hypersensitivity to any of the study vaccine components, including chicken or egg protein, antibiotics, and rubber (from the vaccine vial stoppers).
- Acute or chronic clinically significant pulmonary, cardiovascular, hepatobiliary, metabolic, neurologic, psychiatric, or renal functional abnormality, as determined by medical history, physical examination, or clinical laboratory screening tests (Phase 2 only), which in the opinion of the investigator, might have interfered with the study objectives.
- History of any blood or solid organ cancer.
- History of thrombocytopenic purpura or known bleeding disorder.
- History of seizures.
- Known or suspected immunosuppressed or immune deficient condition of any kind.
- Known Hepatitis B Virus (HBV) or Hepatitis C virus (HCV) infection by self-report (Phase 3) or a positive test for either HBV surface antigen (HBsAg) or HCV antibody using anti-HCV test (Phase 2).
- Known HIV infection (self-report)
- Known active tuberculosis or symptoms of active tuberculosis (self-report).
- History of chronic alcohol abuse and/or illegal drug use.
- Pregnancy or lactation (a negative pregnancy test was required before administration of study product for all women of childbearing potential).
- History of Guillain-Barre Syndrome.
- Any condition in the opinion of the investigator that would have increased the health risk of the subject if he/she participated in the study or interfered with the evaluation of the study objectives.
Note: Minor out-of-range laboratory values no greater than Grade 1 were not considered to be exclusionary at screening.
Data sourced from ClinicalTrials.gov (NCT02612909). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.