

The 20th century antivax movement started, as all things do, as a grift.
not-a-doctor Andrew Wakefield falsified evidence and commited fraud to make people believe the MMR vaccine was dangerous. Not because he was against vaccines in general, but because he got a fuckload of money from a company that sold seperate vaccines who didn’t like the fact that a combination vaccine was costing them a lot of money.

It works pretty good for the rest of us. Of course, we all didn’t keep multi-century old document without ever changing it, because every other country realized that just going “Akshully, the law means something different now” is extremely stupid.
But hey, it’s nice that the US is finally realizing that something everyone else learned in the 1800s.