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He WHO Technical Advisory Group on COVID-19 Vaccine Composition (TAG-CO-VAC) continues to meet regularly to assess the implications of SARS-CoV-2 evolution for COVID-19 vaccine antigen composition and advise WHO on whether changes are needed to the antigen composition of future COVID-19 vaccines. In May 2023, the TAG-CO-VAC recommended the use of a monovalent XBB.1 descendent
He TAG-CO-VAC reconvened on 4-5 December 2023 to review the genetic and antigenic evolution of SARS-CoV-2, the performance of currently approved vaccines against circulating SARS-CoV-2 variants, and the implications for COVID-19 vaccine antigen composition.
News and Press Release in English on World about Health and Epidemic; published on 11 May 2023 by WHO
News and Press Release in Arabic on World about Health and Epidemic; published on 5 May 2023 by WHO