Large study suggests blood plasma can help treat Covid-19, with caveats

Large study suggests blood plasma can help treat Covid-19, with caveats

Large study suggests convalescent plasma can help treat Covid-19, but experts have doubts

By DAMIAN GARDE AND MATTHEW HERPER

YANA PASKOVA/GETTY IMAGES

Quickly administering convalescent plasma had a marked effect on mortality for patients with severe disease. But the study also lacked a control group.

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