What is Herd Immunity? Will the U.S. get there?

Since the beginning of the pandemic, we have been aiming as a society to reach “herd immunity:” a level of collective immunity that will stop the spread of COVID-19. Although vaccination rates are rising, many people are still hesitant. Will we reach herd immunity after all?
Read more from the WHO.
Read about Herd Immunity in San Francisco – an example.