Ulcer provides a pretty startling example. https://www.discovermagazine.com/health/the-doctor-who-drank-infectious-broth-gave-himself-an-ulcer-and-solved-a-med

Ulcer provides a pretty startling example. https://www.discovermagazine.com/health/the-doctor-who-drank-infectious-broth-gave-himself-an-ulcer-and-solved-a-medical-mystery https://www.discovermagazine.com/health/the-doctor-who-drank...