hahaha yeahh i've actually heard of most of these before!
there's a professor of Immunology at my school that has an interesting personal theory about pathogens. He believes that the pathogens that do us harm are actually unintended consequences of insufficient evolutionary adaptation. And that all pathogens and their hosts are simply trying to reach a symbiotic relationship (like the helpful bacterial that currently reside in our gut).
Which kinda makes sense.
A successful pathogen is not one that kills all of its victims (then it wouldnt persist in the world for very long), instead, a pathogen that can provide a benefit to the host will probably stick around for thousands of years to come.
I remember being in that lecture and I felt like I had just taken the red pill from the Matrix haha
Oh, and there was an interesting podcast about a man who cured his allergies by walking around barefoot in African latrines in hopes of getting infected with hookworms. And he did! Now he sells them online (I think from a batch that originated from his own body haha)