variant. when we see these pockets of the variant in the south, in these red states where the vaccinations aren't so high, we could see an increase in cases as the cdc warns that the delta variant could become the dominant strain in the u.s. in the next two months. expect the president to be balancing. the good news on the overall goal, the milestone they're hitting, but also to continue to say there is a lot more work to be done here, geoff. >> dr. gupta, to pick up on mike's point, what would it look like if the delta variant became the dominant strain here in the u.s., and what do we need to do to get to the president's 70% goal to suppress this thing? >> good morning, geoff. we'll see regional surges in places like the southeast. once we hit the fall, we're going to get cold, dry air. that's what covid likes, it likes cold, dry air.