A citizen receives a dose of COVID-19 vaccine at a vaccination site in Yinchuan, capital city of Northwest China's Ningxia Hui autonomous region, Jan 2, 2022. [Photo/Xinhua]
BEIJING -- The amount of COVID-19 vaccine doses administered on the Chinese mainland grew by over 4.15 million on Saturday, with the total number reaching over 3.22 billion, data from the National Health Commission showed Sunday.