The history of the smallpox vaccine is fascinating iirc
milk maids, orphans-as-storage+transportation, really crazy stuff.
And after reading about it, one thing that's neat is that it makes sense. You don't need to talk about homeopathic "water memory" or whatever, and you don't even need a solid understanding of biology
the whole thing just kinda...makes sense.
And yet, here we are...
I mean, it's Torvalds' distro of choice iirc, which should count for something.