have immunity across the country and hopefully decreasing numbers through september, until or unless there is a new variant. duncan: all right, dr. david agus, thank you. the surge is also casting a shadow over the olympics. but team u.s.a. did win its first gold today in the pool by in the men s 400 meter individual medley. so far the u.s. has ten medals second to china, and the u.s. men s basketball team is looking for a fresh start after losing to france. cbs jamie yuccas is at the games and shows us the competition isn t the only thing that has been a challenge. reporter: these are an olympics like no other. right now we re in a type of modified quarantine the first 14 days which means we can leave to go to work but first we have to fill out this health questionnaire on our phones. we are also allowed it go around the corner from the hotel to a convenience store but you better shop fast, you have to be back in 15 minutes. when headed to work, the crew