There is a lot of talk about the need to get herd immunity, in which enough of the population will be vaccinated or have had COVID so that the virus lacks sufficient susceptible people for spread. But no one seems to be sure about what percentage of immune individuals is needed. 60%, 80% or 90%. Some scientific papers and media accounts suggest we will never get to herd immunity. But what is the truth?
via Watts Up With That?
May 3, 2021 at 12:17PM
Iowa Climate Science Education 