A medical worker gives a coronavirus vaccine shot to a patient at a vaccination facility in Beijing, in January. Two pharmaceutical companies in China announced Wednesday they are seeking market approval for new vaccines.

A medical worker gives a coronavirus vaccine shot to a patient at a vaccination facility in Beijing, Friday, Jan. 15, 2021. A city in northern China is building a 3,000-unit quarantine facility to deal with an anticipated overflow of patients as COVID-19 cases rise ahead of the Lunar New Year travel rush. (AP Photo/Mark Schiefelbein)