In 1981, fresh out of medical school, physician-scientist Bruce Walker began his internship at Massachusetts General Hospital. One day, a young patient showed up with an unusual cluster of infections and cancers. Baffled and powerless to treat him, Walker and his colleagues could only watch as the patient quickly succumbed to the mysterious condition.
"I distinctly remember the first case we saw at Mass General," said Walker, who is the Phillip T. and Susan M. Ragon Professor of Medicine at Harvard Medical School and the director of the Ragon Institute of Mass General, MIT, and Harvard. "The attending physician said that although we didn't know what this condition was, we probably would never see another case like it."
Two weeks later, another patient came in with the same set of symptoms. It quickly became clear to Walker and his colleagues that they weren't dealing with a rare disease - it was the beginning of a new epidemic.