I remember the Star Trek episode where they traveled to a planet with residents that had created an immaculate environment for themselves, but their immune systems had become so weak that a small cut would be fatal. Amazing insight there!!!

The best thing we can do for our immune system is to go outside and roll around in the dirt. I ran around barefoot every summer and all summmer on my family farm when I was a kid. I had feet that were like leather sandals and could run full speed across freshly crushed sharp gravel without feeling any discomfort. Maybe that's why I'm so healthy today.