johnson was tweeting that he was in good spirts. adding, "i went for some routine tests as i'm still experiencing coronavirus symptoms." and it was just three days ago he was posting from his home. >> i still have a temperature. >> reporter: the stunning turn for johnson comes as more than 50,000 covid-19 cases have been confirmed in britain. over 5,000 now dead. the coronavirus crisis prompting the queen to make just her fifth address to the nation outside her annual christmas day message. >> we should take comfort that while we may have more still to endure, better days will return. we will be with our friends again. we will be with our families again. we will meet again. >> reporter: those last words inspired by lyrics from a world war ii-era song evoking britain's fighting spirit. >> a very rare but powerful address. james, with us live. he's outside the london hospital where boris johnson is now in intensive care. i know this has really shaken the uk tonight. >> reporter: yeah, david. i think this has come as a real