immunocompromised, that there is some concern from data out of israel and other parts of the world that perhaps you might have decreased protection against ending up in the hospital. and so, that's why for certain -- certainly, certain segments of society. that third shot, if you got two shots of pfizer or moderna seems necessary to keep you as protected as possible from ending up in the hospital if you were exposed to the delta variant. the big question here and the reason why the w.h.o. and many of us in public health are scratching our heads is for someone like myself, for example, joshua. icu doc. nine months ago, i got fully vaccinated. why do i need a booster shot in there is no evidence that folks like myself, less than 65, otherwise healthy, need a booster shot and that's a big part of the country. and so, one, do -- should we be giving booster shots for everybody? lot of us feel, no, the data just isn't there. number two, it actually makes our efforts to convince those who have yet to be vaccinated to get three shots now because now they are thinking that two shots don't work. that is exactly direct quotation from what i have heard from many