And this is because really Europe had gone through, you know, numerous different plagues and outbreaks of disease, whether it is the plague or smallpox. In Africa, they have yellow fever. There's tons of diseases, measles. And now Europeans over the centuries kind of had weeded themselves down to people that had good immunity systems. So they're not being ravaged by these diseases, but the Native Americans, their immunity systems, they know not smallpox. They know not the plague or yellow fever. Now that population total we talked about, between 40 and 100 million in 1492, that's going to be cut by 90% within a couple hundred years.