said,
"As more people became vaccinated, cases dropped off" I can explain different reasons why that happened none of them have anything to do with herd immunity
The Pfizer and moderna vaccines mutate with covid.
We also know they create 168 different mutations.
Jean-claude Perez gives the world the math behind herd immunity. Dr Perez whom the world went to for learning about statistical analysis on the HIV virus is now being ignored we have a problem.
http://stateofthenation.co/wp-content/uploads/2021/04/preprints202104.0034.v3.pdf