They gave him a drug with N=13 for the number of people in his age cohort who have previously received the experimental treatment, this was the last ditch effort to keep him in the WH with what was now apparently a rapidly deteriorating state... he'll pull through more than likely but this is a full blown case, he'll have to recover, it'll get worse before it gets better. What that means with `30 days to the election I'm not sure but it's almost certainly a Biden win at this point and less likely that we'll see a prolonged fight over the results