The modern anti-vax movement started on the left. The first notable measles outbreak in modern US history was in Marin, California which is full of crunchy hippies. You just didn’t hear about it as much because the left shuns their idiots instead of platforming them like the right does.

Dude. The New Age crowd started all this, with their "all natural" remedies. California was at the center of the anti-vaccine movement prior to the right losing their mind about vaccines during Covid