No in the case of corona virus herd immunity is reached at 50% based on the fact that R0 is low for corona virus. If we were dealing with measles with an R0 of 12 we'd need >90%. But because Corona virus is far less infectious we reach herd immunity at 50% IF the vaccine actually works properly (>95% efficacy).
No in the case of corona virus herd immunity is reached at 50% based on the fact that R0 is low for corona virus. If we were dealing with measles with an R0 of 12 we'd need >90%. But because Corona virus is far less infectious we reach herd immunity at 50% IF the vaccine actually works properly (>95% efficacy).