File photo taken on Dec. 13, 2019 shows British Prime Minister Boris Johnson (L) and his partner Carrie Symonds returning to 10 Downing Street in London, Britain. British Prime Minister Boris Johnson was taken to intensive care on Monday night after his coronavirus symptoms worsened, Downing Street said. Johnson has asked Foreign Secretary Dominic Raab to deputize for him, a Downing Street spokesman said. (Xinhua/Han Yan)
