Facts u/americanneverwrong! Great comment!
The most common causes of human disease, in this order:
Parasites (cause of virtually all [ALL] disease)
Poisons
Malnutrition
I don't endorse everything this guy says, but this book made me think long and hard because he brings the sauce for all the difficult-to-except ideas he puts forward.
Example: look up the studies of the time on how the Spanish flu was impossible to transmit from one human to another. When I saw the research from 1918, all of the sudden I realized Trump must've been signaling something when he continually brought up the 1918 Spanish flu over the last few years.
"Because Fireman are commonly seen at the scene of a housefire, do you assume that it must be the firemen that caused the fire?"
Book:
The Contagion Myth: Why Viruses (including "Coronavirus") Are Not the Cause of Disease
by Thomas S. Cowan MD