New @NatureMedicine
A randomized trial of convalescent plasma shows it not only didn't help, but actually harmed
"Patients in the convalescent plasma arm had more serious adverse events (33.4% versus 26.4%; RR = 1.27, 95% CI 1.02–1.57, P = 0.034)."
https://nature.com/articles/s41591-021-01488-2…