Five reasons why COVID herd immunity is probably impossible User burtzev, in the Everything Science subreddit, 22 Mar 2021
Five reasons why COVID herd immunity is probably impossible User RandomCollection, in the Feel The Bern subreddit, 19 Mar 2021
Five reasons why COVID herd immunity is probably impossible User GallantIce, in the Novel Coronavirus (COVID-19) subreddit, 18 Mar 2021
Five reasons why COVID herd immunity is probably impossible User GallantIce, in the COVID-19 subreddit, 18 Mar 2021