The overriding answer from the conventional pharmaceutical and vaccine industry is that functional wellness comes from a pill, a needle, or some kind of medical treatment. As a farmer with thousands of animals and no vet bills, I can attest that the overriding conventional notion in the livestock industry is that a sick animal is apparently pharmaceutically disadvantaged.

I have a completely opposite paradigm: A sick animal testifies to my own mistakes. Maybe I chose weak seedstock. Over many decades of livestock farming, I've had half a dozen economically significant sickness outbreaks across various species. Every single time, the problem was my fault. Hygiene, diet, stress, discomfort, and toxins. An animal can get sick for many reasons, none of which is because it was medically deprived.

That brings me to people.

In his iconic New York Times bestseller "Guns, Germs, and Steel," Jared Diamond explains the ascendancy of cultures that lived proximate to domestic livestock.

People groups who cultivated close relationships with domestic farm animals developed better immune systems.

Many years ago, British epidemiologist David Strachan observed that children with more older siblings had fewer allergies, suggesting that early exposure to infections offered lasting protection.

Many in this field of study rallied around this "hygiene hypothesis," positing that the immune system is like a muscle and needs periodic exercise to be strong.

Consistent with Diamond's overall findings, this theory is best supported by research in Finland.

Beginning a couple of decades ago, researchers in Finland began examining this "immune system as muscle" concept, comparing overall health between closely related children (cousins or siblings) who lived in different environments. The findings added substantial weight to the notion that the immune system has attributes similar to a muscle.

Children who grew up on farms and went to the barn as toddlers—and you know what a toddler does to everything on the fingers—were far more robust than their urban counterparts. A little bit of manure, dirt, and moldy hay or grain stimulated the immune system and reduced vulnerability to colds, flu, and other common childhood maladies.

Now for personal disclosure: Friends who know me know I routinely drink out of cow troughs with the cows. I do it not because I'm thirsty, but because I want a bigger variety of bugs in my microbiome. And I want some exposure to whatever unseen antagonist might be out there. The point is to exercise my immune system so that when something really serious comes along, it's strong enough to fight it off.

Yes, I could die tomorrow. But for decades, I have gone many years without the common issues that plague most folks. That is not pride; it is humble acknowledgment that we have a fearfully and wonderfully made body that is ready to house health if we give it half a chance.