Arturo Casadevall & Nigel Paneth, Columnists

FDA Made the Right Call on Covid Plasma Treatment

The agency has been accused of playing politics in approving transfusions from coronavirus survivors. It was following the science.

Science.

Photographer: Geert Vanden Wijngaert/Bloomberg

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Ordinarily, a new medical treatment is approved only after at least one large-scale, randomized controlled trial shows it to be effective without being harmful. Yet at times — and notably during epidemics — evidence can mount that a treatment is safe and effective before we have that final evidence. We think this is the case with Covid-19 and convalescent plasma.

On Sunday, the Food and Drug administration gave a limited, emergency authorization for the inpatient use of convalescent plasma, which is donated by people who have recovered from Covid-19. The decision set off a media firestorm, with politicians, public-health officials and medical professionals insisting that the Donald Trump administration was playing politics with science.