> Fauci Predicts U.S. Could See Signs Of Herd Immunity By Late March Or Early April

https://www.npr.org/sections/coronavirus-live-updates/2020/1...

> "I would say 50% would have to get vaccinated before you start to see an impact," Fauci said. "But I would say 75 to 85% would have to get vaccinated if you want to have that blanket of herd immunity."

Talking about herd immunity doesn't make sense unless the vaccine prevented transmission.

Then, May 2021:

> Masks off? Fauci confirms ‘extremely low’ risk of transmission, infection for vaccinated

https://www.msnbc.com/all-in/watch/dr-fauci-confirms-extreme...