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you know vaccinated people in the united states really don t get tested even if they ve been exposed to someone with covid. and the reason it s important. so it s early study. as mike pointed out there are different studies that have shown the opposite, but i think we need to be ahead of this, and that probably means collecting more data. professor, i mean everything we ve seen happen, doesn t it all just reinforce the truth that scientists already know which is vaccines are right now the best hope for humanity and for all of us getting back to some semblance of normal. and whether it s the delta variant, the longer this goes on, there s going to be other variants, which this thing will continue to mutate. isn t that right? right. and in fact, i think if there s