Holy hell, FDA Commissioner Stephen Hahn's grasp of statistics is alarming. A 35% reduction in mortality does NOT mean that if 100 people get covid-19 and are treated with convalescent plasma, then 35 lives will be saved.

The head of the federal agency in charge of authorizing new medical treatments doesn't understand what reduction in mortality means. How can we trust anything the FDA does, if this is the guy who decides whether the agency will bow to political pressure? https://twitter.com/susancrabtree/status/1297652743843147776?s=19

This appears to be the data @SteveFDA was citing, but unable to understand. A plasma study (with no comparison group) found the treatment reduced the 7-day death rate from 11.9% to 8.7% – which Hahn interpreted to mean that 35 in 100 lives would be saved! h/t @taylorcyoung

And now the FDA's Twitter account is promoting Hahn's disinfo.

Full quote from Hahn: "Let me just put that in perspective... What that means is if... 100 people who are sick with covid-19, 35 would have been saved because of the administration of plasma." https://twitter.com/US_FDA/status/1297662384060981248?s=19