As a result of what we are seeing right now, the numbers you just showed on the screen. what are they to do is the question? when can they feel fine and come out of isolation and not be a list to number, five days picked by the cdc when it might be safe. can i show you, kate, if we have the graphic. if you look from day 10 to day zero, for example, the question is, how likely are you still to be contagious at day five? it's about a third of people will still be contagious at day five. that's the first thing. why day five? a third of people may be contagious. second of all, no tests required at...