February 03, 2021

A Rocky Road On The Way To Herd Immunity For COVID-19-NPR

Scientists estimate that somewhere between 70% and 85% of people need to be immune from the coronavirus before the disease will wane through a process known as herd immunity. Both natural immunity and vaccines can play a role in achieving that goal. But getting there won't be easy. New variants of the virus, for example, could create a new wave of infections, even in people who have been vaccinated or previously exposed. That could slow progress toward herd immunity – or, if the virus successfully evades vaccines, it could put herd immunity out of reach. NPR, 02/03/2021