>> more transmissible than the alpha variant or the uk variant that we have here. we saw that quickly become the dominant strain in a period of one or two months and i anticipate that is going to be what happens with the delta strain here. >> and the worry seems to be, doctor, showing our viewers, the county map of vaccinations and if you look down in the southeast, some places in the west, the places that are lighter where the vaccine rollout is lagging, the concern seems to be that in those places you could have regional spikes. is that right? >> it's definitely the case that you're going to...