Probably not. Mexico actually has a pretty good childhood vaccination program, although people do get smuggled through there from a lot of other places, such as the ME and Asia, which don’t have much in the way of vaccinations. It’s certainly possible that it was brought in by immigrants, especially if we don’t demand a vaccination certificate (but of course, they’d get a counterfeit one anyway as part of their immigration package).
But the only reason there would be an “outbreak” here was because Americans weren’t having their kids vaccinated. Otherwise, the disease simply would have expired after a few cases. Get your kids or grandkids vaccinated.
Do click the link I posted in comment 3.
Even in countries like China with NO vaccine exemptions there have been measles outbreaks. The vaccine itself has issues. The article I posted explains those.
“Get your kids or grandkids vaccinated.”
No thanks.....
People at high risk and young infants without a developed immune system should stay out of environments where diseases are likely to spread. Even getting vaccines shouldn't negate that responsibility for parents.
How much of this spread is because of unvaccinated invaders? If people really care about the health situation, they'd demand some border control!