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vaccinating. i don't know. is this something in the long run we'll be able to keep up with? >> i think we have to think about what the optimal vaccine policy is going to be. is this going to be something where we update strain changes the way we do with flu or something where we're satisfied with protection against serious illness, hospitalization, and death? i think that's sort of going to dictate what we do. but when you're trying to guess what strains are going to be coming up, just like with flu, it's a guessing game and you'll always be in a reactive stance, not proactive. that's why i think the better solution might be universal coronavirus vaccines, one that targets parts of the virus that don't mu tatd, not just for sars 2, but there are companies working on this and they are moving into clinical trials. hopefully a universal coronavirus will be the way we tackle this problem and don't have to get into this game of guessing. >> the numbers are still quite staggering here in the u.s. the average daily death toll is