doses, but whose immune system doesn't respond in the same way. and for whom an infection would be a lot more severe. and so that's what i'm trying to do, go around, make sure they have masks on, try to separate people. with so many people coming in at the same time, with covid, for covid, for non-covid reasons, whatever it is, it makes it a lot harder to do that job to keep that covid parenttient safd the non-covid patient safe as well. >> thank you for giving us the context of the whole ecosystem and not just one patient. >> thank you, lauren. now to a controversy surrounding the world's number one men's tennis player. you know him. novak djokovic. he's in australia, hoping to defend his title at the australian open. but the threat of deportation is still looming after admissions that he made some mistakes on his immigration forms and didn't isolate after recently testing positive for covid. we'll take it all on with bob