Is it true that the immigrant children arriving in the United States right now (most from Central America) are bringing with them diseases that have been eradicated in the good old US of A? No, it's not, and here's why.
Getting your shots is a good idea, but we don't need all the vaccines that are out there right now. And, if we keep it up, there will come the day when we won't need vaccines at all.
Measles used to be a "right of passage" for children in the United States, but 1 in 1,000, or so, would come down with a very serious complication, or even die. That all changed with the introduction of the MMR vaccine in the 1960s, so much so that measles was declared eliminated from North America. Unfortunately, all good things must come to an end.