you're vaccinated, that you're any more likely to end up in the hospital, which is a very good thing. this is a variant that appears to behave with some similarity to other variants in the past, the lambda and beta variants, we haven't talked a lot about those. viewers may wonder what we're talking about. these are variants that in part arose in places like south africa in the past. they didn't become the dominant strain. they were not worldwide transmissible. and two doses of the vaccine, katy, important, still kept people out of the hospital to the tune of 97% effective against severe illness. it's important to remain calm and to recognize that we have great therapeutics and vaccines and that we'll learn more in the weeks ahead, specifically regarding vaccine effectiveness. there's a lot of reasons to remain calm right now. >> that's a good point, we do have therapeutics or therapeutics are on the way for treating covid. also south africa, we should mention, has a very low rate of vaccination. i believe it's somewhere around 24% of people that have been vaccinated in that country.