National Health & Safety NIH Warns Data On Effectiveness Of Convalescent Plasma In Treating COVID-19 Is Weak 4:04pm August 19, 2020 by Joe Palca Health Medical Treatments National Share URL copied to clipboard! Copyright 2020 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered NASA's administrator on ambitions to return to the moon Protests in Georgia over country's 'foreign influence' bill 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate