world? >> i don't think so. i mean, if you look at the production from some of these vaccine makers, you're talking about billions of doses that are likely to be produced. the problem here at home is the lack of demand, whereas in many countries around the world it's lack of supply. i think sort of trying to equalize that a bit makes a lot of sense. i think more to the point, jake, and it's always one of these vaguer things to explain, but more times the various transmits from one human to another, the more mutations might potentially occur. most of those mutations aren't going to be a problem at all, but one of them could be. the more times it happens, the higher the chances you're going to have a problematic mutation. there is a need to slow the spread obviously here in the united states but all over the world as well. >> dr. gupta, thank you so much. coming up next, cnn goes inside what used to be a huge us air base, now under taliban control. stay with us. and new hickory-smoked bacon.