There are superheros in this world.

I'm not just talking about comic book superheros, or sports superheros. And I don't want to discount the heroics of police officers or firefighters or the brave fighters in armed conflict around the world.
Barry Marshall is such a superhero. He is a man who studied a disease, explored its effects, identified its cause and found a cure.

What did Barry Marshall cure?
In 1982, Dr. Marshall and his collegue Dr. Robin Warren studied biopsies from a ton of patients. They identified a curious and tiny new culprit, suspiciously adjacent to inflammation inside the stomach: It was a bacteria called Helicobacter pylori.