>Anti-vaxxers tend to be described as middle/upper-class liberals.

I've heard this, but it doesn't square with my own impressions, and a cursory Google search suggests that anti-vaxxers are not, in fact, predominantly liberal.

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5784985/

[2] https://medium.com/the-future-is-electric/conservatives-are-...