https://www.cnbc.com/amp/2020/08/07/...not-great.html
beh 50% è sempre meglio di niente no?White House coronavirus advisor Dr. Anthony Fauci that the chances of scientists creating a highly effective vaccine — one that provides 98% or more guaranteed protection — for the virus are slim.
Scientists are hoping for a coronavirus vaccine that is at least 75% effective, but 50% or 60% effective would be acceptable, too, he said.
The FDA has said it would authorize a coronavirus vaccine so long as it is safe and at least 50% effective.