Probably most cases occur in communities with large immigrant populations. California, Wisconsin, and Washington all have large agricultural presences.
Just guessing...
I was thinking the same thing but there is no mention of where the outbreaks are occurring in Washington.
You could be right, but the thing is that those kids who are school-age have to present their immunization records to the school nurse. In Texas public schools, you show ‘em (the records) or you hold ‘em (the kids) until you do. Then you have the whole truancy thing going on.
So, I wonder what age-group is hardest hit?