Take reasonable precautions and measles isn’t unbeatable. I have really had it three times way back when and I’m still alive. To be sure, I was sick and I remember what it was like all these years later. But, sheesh. Don’t panic.
And the first thing needed to be done would be securing the border.
But that is not the intention of the evil corrupt ruling class. They want fear, chaos, crime and diseases. And they make this obvious every day.