Do the outbreaks coincide with where illegals ended up?
I decided to ask Google the question; “Is measels outbreak caused by unvaccinated Americans and Europeans or by illegal immigrants?” There were too many sources listed for me to study them all. However, from reading the titles and short explanations of content, it appears the unvaccinated Americans and Europeans are a significant or more likely cause. One link said that Mexico has a higher rate of vaccination (MMR) than does the US. If that is the case, it is unlikely large numbers of immigrants from Mexico and Central America are the cause. Slow travel from Central America across Mexico means people would have time to get sick and end up in the Mexican health care system. At any rate, here are a lot of articles for you to examine at leisure.
My pertner’s doctor son insisted I have the MMR before visiting with their new baby. Kaiser Permanente had given it to me a few years ago even though I had it as a child. I remember days of lying in a darkened room. Apparently light can damage the eyes while sick from it. So if you or your child get it, NO WIFI or TV. I have decided NO MORE COVID VAX for me, but I would recommend updating your MMR if at risk for exposure. Building up immunity with Vitamin D3 and C, zinc, and quercetin if Covid is in your area. and especially in winter or air conditioner season in HOT climate zones (lack of sun exposure). When parents ask me about vaccines for their children, I recommend that no MORE THAN THREE be given at one time, and ONLY when the baby/child is in good health.
Check out the Google link in my comment #39. I think I saw some links listed there that might answer your question.