[resoluteteeth]

What viruses do we have herd immunity to that we will lose if people aren't exposed for 5-10 years due to wearing masks?

[runnerup]

Indeed. Who’s to say that viruses might not lose their ability to infect humans if humans don’t carry them for the next 10-15 years?

If everyone strictly followed the teachings of Christ and all humans were monogamous for an entire generation, would we lose herd immunity to STDs or would STDs go extinct?