Stephen Crohn helped care for his partner while he was dying from a disease that didn't even have a name yet. In was 1978, and AIDS had just begun sweeping through New York City. Several of Crohn's friends were dying, except he never got sick. He was immune to HIV. After years of helping scientists gain a better understanding of the disease by studying his genetic make-up, Crohn committed suicide on August 23rd. He was 66.