The reason: the elusive goal of herd immunity is looking difficult to attain at all.
Pandemic expert Dr. Anthony Fauci has asked for a change in the way the words “herd immunity.”
“That’s why we stopped using herd immunity in the classic sense.

I’m saying: Forget that for a second.
You vaccinate enough people, the infections are going to go down.”
However, this changed because doctors had based their assumptions on the original form of the virus.

Still, public health experts haven’t stopped trying to combat the spread of COVID-19.
They are calling on governments to fight the pandemic by cutting the risk of airborne transmissions.