WHO世界卫生组织：2026年关于COVID-19疫苗的立场文件（英文版）

This WHO Position Paper updates WHO recommendations on the use of COVID-19 vaccines in the context of sustained SARS-CoV-2 circulation, high levels of population immunity, and the availability of variant-adapted vaccines.Developed following recommendations by the Strategic Advisory Group of Experts (SAGE) on Immunization, it summarizes current evidence on COVID-19 epidemiology, populations at increased risk of severe disease, vaccine characteristics, immunogenicity, effectiveness, safety, and