infection? we don't know. i'm sure this workup has already been done and they probably know the answer to it. the fact that he's already well, probably transferring out of the icu in the next 48, 72 hours if not sooner, are all good prognostic signs. early treatment and prevention and an early rebound, rachel, are all great predictors for getting out of the icu and ultimately getting back home. >> they say after two days of treatment his white blood cell count is trending down. how should we understand that? >> that's a great sign. there's the sort of clinical systems i went through, heart rate, respiratory rate, fever. then there's what we get on our lab values. we get that lab culture of our blood, is there something growing, like a bacteria or a fungus. then we also get basic labs like our white blood cell count which for our viewers out there, that's the cells in your blood that are fighting off infection. if they're really high, that means, gosh, you might be