drugset / Trial / NCT03330132
Immunogenicity of Alternative Annual Influenza Vaccination Strategies in Older Adults in Hong Kong
Phase 4
Completed
1861 enrolled
The University of Hong Kong
Centers for Disease Control and Prevention · collab
RandomizedParallel-groupTriple-blindPrevention
Summary
This study allows to evaluate the strength and duration of immune responses between annual receipt of standard inactivated vaccine and alternative potent vaccines, including annual receipt of adjuvanted inactivated vaccine, annual receipt of high-dose inactivated vaccine, annual receipt of recombinant HA vaccine, and the alternate combinations of the former three vaccines over four years, for identifying improved vaccination strategies for influenza vaccination in older adults in a location experiencing a subtropical pattern in influenza activity.
Timeline
- Start
- 2017-10-07
- Primary completion
- 2025-12-31
- Completion
- 2025-12-31
Publications
- Daulagala P, Leung YWY, Luk LLH, Ho F, Chu SHN, Lin J, Cheng SMS, Leung NHL, Eichelberger MC, Peiris M, Iuliano AD, Thompson MG, Cowling BJ, Yen HL. Antineuraminidase Antibody Responses in Older Adults After Consecutive Vaccinations With Enhanced Influenza Vaccines: A Randomized Controlled Trial. J Infect Dis. 2026 Apr 29;233(4):e1022-e1030. doi: 10.1093/infdis/jiaf616.
- Fox A, Sanchez-Ovando S, Carolan L, Hadiprodjo AJ, Chen Y, Ho F, Cheng SMS, Thompson MG, Iuliano AD, Levine MZ, Valkenburg SA, Ip DKM, Peiris JSM, Sullivan SG, Cowling BJ, Leung NHL. Enhanced Influenza Vaccines Extend A(H3N2) Antibody Reactivity in Older Adults but Prior Vaccination Effects Persist. Clin Infect Dis. 2025 Nov 6;81(4):e192-e201. doi: 10.1093/cid/ciaf060.
- Cowling BJ, Thompson MG, Ng TWY, Fang VJ, Perera RAPM, Leung NHL, Chen Y, So HC, Ip DKM, Iuliano AD. Comparative Reactogenicity of Enhanced Influenza Vaccines in Older Adults. J Infect Dis. 2020 Sep 14;222(8):1383-1391. doi: 10.1093/infdis/jiaa255.
- Cowling BJ, Perera RAPM, Valkenburg SA, Leung NHL, Iuliano AD, Tam YH, Wong JHF, Fang VJ, Li APY, So HC, Ip DKM, Azziz-Baumgartner E, Fry AM, Levine MZ, Gangappa S, Sambhara S, Barr IG, Skowronski DM, Peiris JSM, Thompson MG. Comparative Immunogenicity of Several Enhanced Influenza Vaccine Options for Older Adults: A Randomized, Controlled Trial. Clin Infect Dis. 2020 Oct 23;71(7):1704-1714. doi: 10.1093/cid/ciz1034.
Drugs
| Evaluation | Drug | Modality | Dose | Route |
|---|---|---|---|---|
| Subject | FLUAD | Vaccine | 0.5 ml | — |
| Subject | FluQuadri | Vaccine | 0.5 ml | — |
| Subject | Flublok | Vaccine | 0.5 ml | — |
| Subject | Influenza Virus Vaccine | Vaccine | 0.5 ml | — |