> Evading pathogen pressure is just another benefit behind the scenes. I'm imagining that this relates to a specific pathogen that may no longer exist (like th

> Evading pathogen pressure is just another benefit behind the scenes. I'm imagining that this relates to a specific pathogen that may no longer exist (like the presumed mechanism of the most common cystic fibrosis mutations and cholera). I'm not sure how this would relate to humans running, however.