Population immunity, post-vaccine and post-infection antibody responses to influenza A (H3N2) subclade J.2 and K (J.2.4.1) viruses, Hong Kong, 2025 - PubMed
5 hours ago
- #serology
- #influenza A
- #vaccines
- Study assessed HAI antibody titres against 2025 influenza A(H3N2) J.2 and subclade K (J.2.4.1) viruses in Hong Kong.
- Human sera with high J.2 HAI titres showed strong cross-reaction with subclade K.
- Recombinant haemagglutinin- or egg-based J.2 A(H3N2) vaccines boosted GMT to K virus by 5.6-fold and 2.6-fold, respectively.