Prior to the measles epidemic that is happening in NY right now, it had been eradicated for so long that many of the doctors there had never even seen measles, and didn’t know what they were looking at when they started to see the first cases erupt.
None of that is a study, which I stated Ive yet to see.
You are conflating the doctors experience in anY with exposure that hadnt existed before the invasion from down south.
Either way, it is caused by lack of vaccinations.