Ring vaccination of COVID‐19 vaccines in medium‐ and high‐risk areas of countries with low incidence of SARS‐CoV‐2 infection – Wiley

Typically, winter brings on the peak months of respiratory infections. Indeed, colder weather in the Northern Hemisphere has brought multiple new waves of coronavirus infectious disease 2019 (COVID19) epidemic to some countries where COVID19 epidemic was under control before. For example, since the beginning of winter, several smallscale outbreaks of COVID19 have been caused by local or imported cases in China. Meanwhile, the emergence of viral variants with higher transmissibility and the possible…

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