A medical worker administers a booster shot of COVID-19 vaccine to a local resident at a temporary vaccination site in Beijing, capital of China, Nov. 29, 2021. (Xinhua/Ren Chao)
BEIJING, Dec. 13 (Xinhua) -- More than 2.61 billion COVID-19 vaccine doses had been administered on the Chinese mainland as of Sunday, data from the National Health Commission showed Monday. ■
