Before his mother, who had lost her brother to malaria, died in childbirth when Fazlur Rahman was just seven years old, she told him, “Someday you will be a doctor, Fazlur, and help people.” He took her urging to heart. A native of what’s now the South Asian country of Bangladesh, Rahman remembers residents of the small village where he was born dying of epidemics, often without medical care.After he left home and eventually completed his training in New York City and at Baylor College of Medicine, in Houston, in his early thirties, he had to decide where he would practice. Most of his medical school friends were headed to big cities like Dallas and Phoenix, but advice from a mentor set him on a…