A woman wearing a face mask following the coronavirus disease (COVID-19) outbreak scans a QR code for health information outside a hospital in Beijing, China, December 14, 2021. REUTERS/Carlos Garcia Rawlins

FILE PHOTO: Workers in protective suits carry items for residents at a compound under lockdown following new cases of the coronavirus disease (COVID-19) in Zhenhai district of Ningbo, Zhejiang province, China December 7, 2021. Picture taken December 7, 2021. China Daily via REUTERS

FILE PHOTO: Medical workers in protective suits collect swabs from residents at a nucleic acid testing site during a third round of mass testing for the coronavirus disease (COVID-19) in Zhenhai district of Ningbo, Zhejiang province, China December 12, 2021. Picture taken December 12, 2021. cnsphoto via REUTERS

People wearing face masks following the coronavirus disease (COVID-19) outbreak shop at a supermarket in Beijing, China, December 14, 2021. REUTERS/Carlos Garcia Rawlins

A China Eastern Airlines aircraft and Shanghai Airlines aircraft are seen in Hongqiao International Airport in Shanghai, following the coronavirus disease (COVID-19) outbreak, China. REUTERS