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The vaccines are all standing up pretty well -- Pfizer, Moderna and Johnson Johnson -- for severe disease, now, that's not to say that we might not eventually get to a point where we really need people to get boosters to prevent more severe illness. But, really, the majority of the breakthrough infections are colds, maybe flu-like illness -- not the scary illnesses that we were facing before. So my main message is, don't panic. You're going to be okay.