A medical worker guides a recipient at a temporary vaccination site in  Haidian District of Beijing, capital of China, Jan. 31, 2021. The  administration of the second dose of COVID-19 vaccines for key groups of  residents throughout Beijing started on Jan. 22, and is expected to  conclude before Feb. 8. By Jan. 19, Beijing has completed administering  the first dose of the jab among specific groups of people with higher  infection risks, and over 1.9 million people in Beijing have received  the first dose of COVID-19 vaccine. [Photo via Xinhua]

A medical work disinfects the observation area of a temporary  vaccination site in Haidian District of Beijing, capital of China, Jan.  31, 2021. The administration of the second dose of COVID-19 vaccines for  key groups of residents throughout Beijing started on Jan. 22, and is  expected to conclude before Feb. 8. By Jan. 19, Beijing has completed  administering the first dose of the jab among specific groups of people  with higher infection risks, and over 1.9 million people in Beijing have  received the first dose of COVID-19 vaccine. [Photo via Xinhua]

A medical worker inoculates a recipient with the second dose of COVID-19  vaccine at a temporary vaccination site in Haidian District of Beijing,  capital of China, Jan. 31, 2021. The administration of the second dose  of COVID-19 vaccines for key groups of residents throughout Beijing  started on Jan. 22, and is expected to conclude before Feb. 8. By Jan.  19, Beijing has completed administering the first dose of the jab among  specific groups of people with higher infection risks, and over 1.9  million people in Beijing have received the first dose of COVID-19  vaccine. [Photo via Xinhua]

Medical workers check the first dose inoculation information of  recipients at a temporary vaccination site in Haidian District of  Beijing, capital of China, Jan. 31, 2021. The administration of the  second dose of COVID-19 vaccines for key groups of residents throughout  Beijing started on Jan. 22, and is expected to conclude before Feb. 8.  By Jan. 19, Beijing has completed administering the first dose of the  jab among specific groups of people with higher infection risks, and  over 1.9 million people in Beijing have received the first dose of  COVID-19 vaccine. [Photo via Xinhua]