And experts at the Centers for Disease Control and Prevention have set aside herd immunity as a national goal. “We said, based on our experience with other diseases, that when you get up to 70% to 80%, you often get herd immunity,” he said. “It’s impossible to predict what herd immunity will be in a new pathogen until you reach herd immunity.”The CDC’s new approach will reflect this uncertainty. Changes in the coronavirus itself have also made herd immunity a moving target. The calculation that produced a herd immunity estimate of 70% to 85% rests heavily on the innate transmissibility of SARS-CoV-2.

Source: Los Angeles Times November 12, 2021 16:02 UTC