Placebo-Controlled Trials of Covid-19 Vaccines - Why We Still Need Them.
null nullPhilip R KrauseThomas R FlemingIra M LonginiRichard PetoValerie BeralBalram BhargavaAlejandro CraviotoJakob P CramerSusan S EllenbergJ Peter FigueroaElizabeth HalloranAna M Henao-RestrepoMichael J RyanMyron M LevineMartha C NasonHanna M NohynekStanley PlotkinHelen ReesJerome A SinghSoumya SwaminathanPublished in: The New England journal of medicine (2020)