Over 2.64 bln COVID-19 vaccine doses administered on Chinese mainland

A medical worker prepares a dose of COVID-19 vaccine at a vaccination site in Beijing, Dec. 9, 2021.(Xinhua/Zhang Yuwei)

BEIJING, Dec. 16 (Xinhua) -- More than 2.64 billion COVID-19 vaccine doses had been administered on the Chinese mainland as of Wednesday, data from the National Health Commission showed Thursday.