 that causes preventable disease. And that's measles, for example. I mean, my shot from more than 50 years ago is still active, according to the tests that my doctor gave me, and said, yeah, you're still immune to measles, even though a long time has gone by. Why is it we can't get the rest of those vaccinations to be as long-lasting? Well, because the virus gets a vote. It's the virus that has the long incubation period for measles.