five days. if the test comes back positive, but only if you chose to take it, right. >> optional. >> the person should continue to isolate for a total of 10 days. the guidance stopped short for everyone to get tested before leaving isolation. if i get a bad job explaining what the guidance is, it's not my fault, trust me. joining me now cnn chief medical correspondent dr. sanjay gupta and author of "keep keep sharp, build a better brain at any age." they have had a really tough job the last few years. but i can't understand what they are saying and why. can you explain it? and. >> well, unfortunately, john, it is pretty confusing. it is going to create these lines as we have seen throughout the pandemic. if you want to do the right thing and you can get your hands on a test, you will do the right