Peak anti-vax for measles was like two decades ago, at least over here in the UK - we were at pretty much an all-time record high for MMR vaccinations of kids before Covid came along and disrupted all the vaccination programs. (I know the BBC ran a very misleading article making it sound like Facebook was causing a vaccination crisis and putting us at risk of a measles outbreak, but in reality the actual danger is from all the people who weren't vaccinated years ago due in part to their own bad reporting.)