and it truly less severe? how about things like long covid? is it still as likely to cause long covid type symptoms even if it's less severe? and then the impact obviously on immunity overall. vaccines and infection acquired immunity. we know in south africa, a lot of people were getting omicron despite the fact that they were infected before. does infection acquired immunity with a previous variant was not as protective? what about the vaccines? those are big questions still. . >> you know, dr. fauci, i heard him with wolf yesterday say boosters are the best bet right now. the best thing you can do -- first of all, is get vaccinated. but get boosted. >> let me show you some of the data they were relying on for that. if you look at omicron and delta specifically and the protection over time, the first few weeks when you have both these variants side by side, the protection is pretty good.