A staff member monitors the observation area of a COVID-19 vaccination  site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing has launched a local mass vaccination drive on Feb. 17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

A man receives a dose of the COVID-19 vaccine at a vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing  District of Beijing has launched a local mass vaccination drive on Feb.  17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

Local residents sit at the observation area of a COVID-19 vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing has launched a local mass vaccination drive  on Feb. 17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

People wait in line at a COVID-19 vaccination site in Daxing District of  Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing  has launched a local mass vaccination drive on Feb. 17, setting up 26  sites in the region for the mass vaccination. (Xinhua/Peng Ziyang)

Staff members disinfect the observation area of a COVID-19 vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing has launched a local mass vaccination drive on Feb. 17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

Local residents wait for vaccination at a COVID-19 vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing has launched a local mass vaccination drive on Feb.  17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

A woman registers before the COVID-19 vaccination at a vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing  District of Beijing has launched a local mass vaccination drive on Feb. 17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

A woman registers before the COVID-19 vaccination at a vaccination site in Daxing District of Beijing, capital of China, Feb. 21, 2021. Daxing  District of Beijing has launched a local mass vaccination drive on Feb. 17, setting up 26 sites in the region for the mass vaccination.  (Xinhua/Peng Ziyang)

Local residents wait at a COVID-19 vaccination site in Daxing District  of Beijing, capital of China, Feb. 21, 2021. Daxing District of Beijing  has launched a local mass vaccination drive on Feb. 17, setting up 26  sites in the region for the mass vaccination. (Xinhua/Peng Ziyang)