Prime Minister Boris Johnson said on Friday that he had the coronavirus and was suffering mild symptoms, becoming the first leader of a major Western country known to have contracted the virus.<br /><br />The prime minister, 55, said he would isolate himself in his official residence, 10 Downing Street, but would not relinquish his duties.<br /><br />On Monday, after resisting harsher measures for more than a week, Mr. Johnson imposed a lockdown on Britain to try to curb the spread of the illness. He continued to meet with advisers and appeared most days at a televised briefing, though not on Thursday.
