Official last appeared in public, without a mask, as Trump falsely declared victory in the vote count; several other staffers also said to test positive

Chief of staff says 'a number of us... were very concerned'; poll: 2/3 of Americans believe US president would not have contracted COVID-19 if he'd taken pandemic seriously

President sounds upbeat but winded, admits next few days will be real test of whether he can beat coronavirus; claims he had 'no choice' but to potentially expose himself

Head physician says president to remain under observation Sunday, but not running a fever or requiring oxygen and has made substantial progress since initial diagnosis

After president's doctors paint rosy picture, Mark Meadows revealed to be source who earlier told media president not yet out of the woods; Trump tweets: 'Feeling well!'

Press secretary, chief of staff refuse to comment on reporters' claims they've been told of a number of infections, shortly after maskless masses packed South Lawn