There was an interesting study on the herd immunity threshold, as well as pre-existing immunity posted here about a month ago: https://news.ycombinator.com/ite

There was an interesting study on the herd immunity threshold, as well as pre-existing immunity posted here about a month ago: https://news.ycombinator.com/item?id=24504716 https://news.ycombinator.com/item?id=24504716 https://www.bmj.com/content/370/bmj.m3563 https://www.bmj.com/content/370/bmj.m3563