[ignoramous]

> Each herd immunity level is thus dependent on health measures, which is why "reaching" herd immunity and then loosening up health measures won't work.

Yep. Here's a very approachable and well written paper on the topic: https://academic.oup.com/cid/article/52/7/911/299077

And my comment on it from 6 months ago: https://news.ycombinator.com/item?id=22818413