I remember this happening, too. At the time reddit and other places were ranting about anti-vax Karens and keeping un-vaxed kids out of classrooms.

Around the same time the US started seeing cases of diseases we had eradicated long ago. They all originated in heavily "immigrant" populated areas. I initially thought this was to shift attention away from the people bringing this in to the country and place blame on anti-vaxxers. I don't know what to think these days.