On: CDC director: Keeping schools closed greater health threat to children reopening

[ceejayoz]

> Of course, it's not like we have ever achieved herd immunity to any disease before vaccines.

Sure we have.

https://en.wikipedia.org/wiki/Endogenous_retrovirus

There are only seven known strains of coronavirus that infect humans, all discovered in recent decades. It's likely we've gotten and fought off many others in our millions of years of evolutionary history.