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Interim BNT162b2 LP.8.1-adapted COVID-19 Vaccine Effectiveness among Non-Immunocompromised Older Adults in California and Louisiana, August-December 2025

Zambrano, L. D.; Yu, T.; Mateus, J.; Zhao, X.; Andersen, K.; Valluri, S. R.; Karakuzu Ikizler, B.; Nepal, R. M.; MacNeil, A. J.; Volkman, H. R.

2026-07-31 public and global health
10.64898/2026.07.27.26359050 medRxiv
Show abstract

Evidence on vaccine effectiveness (VE) of 2025-26 COVID-19 vaccines is limited. We estimated VE of BNT162b2 LP.8.1-adapted vaccine among non-immunocompromised adults [≥]65 years through December 2025 using linked claims and immunization registry data from two U.S. states. VE against COVID-19-related ED/UC encounters was 48% (95% CI:19, 66).

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