topol: it is a great question. is youern about the j&j will have that great convenience of the one shot, but it might not have the same 95% efficacy as the pfizer and moderna. so i don't want to see efficacy compromised. if it was up to me, which it isn't of course, i would get as much of the mrna vaccines as possible. pfizer also has a program with two shots with a priming dose that may turn out to be 95%, but when you cut corners and try to just get it with only one, it might not be as good. i welcome a surprise to see such a high efficacy with one shot. alix: president trump yesterday said that everyone in the u.s. who wants a vaccine can get one. pfizer says i can't give you any more until mid june, according to reports from "the new york times." how much can the u.s. actually secure? how quickly? trump'sl: well, mr. statement about the vaccine, anyone can get it, is just about as accurate as getting testing. it is totally false. we have learned that the allocation between now and year-end, which will largely g