Good thread on "herd immunity" from a strictly numbers standpoint. This is from the Mississippi governor and just based on Mississippi, but it applies everywhere.
I do think one of the biggest mistakes from the beginning was the misinformation about masks. At the end of February the surgeon general said masks don't help at all and it wasn't until the beginning of April until the CDC said they "may help".
Link The WHO didn't recommend them until June
Link. This has hurt their credibility and now people don't want to listen.
Masks are our best option right now and herd immunity is a terrible plan.