More countries suspend UK flights amid concern over highly infectious new COVID-19 strain (4)

A man wearing a face mask walks past the "London Eye" by the River Thames in London, Britain, on Dec. 21, 2020. On Sunday, British Health Secretary Matt Hancock warned that the new strain of COVID-19 is "out of control" in Britain, urging Britons to behave as if they already have the virus, especially in areas under the new Tier Four restrictions. (Xinhua/Han Yan)