Articles
Types of data requested to inform May 2026 COVID-19 vaccine antigen composition deliberations
The purpose of this statement is to guide the scientific community and vaccine manufacturers as to which data should be generated ahead of the May 2026 TAG-CO-VAC deliberations.
The WHO Technical Advisory Group on COVID-19 Vaccine Composition (TAG-CO-VAC) continues to closely monitor the genetic and antigenic evolution of SARS-CoV-2 variants, immune responses to SARS-CoV-2 infection and COVID-19 vaccination, and the performance of COVID-19 vaccines against circulating variants. Based on these evaluations, WHO advises vaccine manufacturers and regulatory authorities on the implications for future updates to COVID-19 vaccine antigen composition.
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