In this photo released by Xinhua News Agency, medical workers take swabs from residents in Shijiazhuang in north China’s Hebei province on Jan. 6. Authorities have announced new restrictions to contain the coronavirus.

In this photo released by Xinhua News Agency, medical workers in a protective suits take swab from residents near a residential area in Shijiazhuang in north China’s Hebei province on Wednesday, Jan. 6, 2021. Lockdown measures were being imposed in a northern Chinese province where coronavirus cases more than doubled in the region near Beijing that’s due to host some events in next year’s Winter Olympics. (Mu Yu/Xinhua via AP)