General C. Everett Koop, who served as U.S. surgeon general from 1982 to 1989, died on Monday at the age of 96, according to CNN.
Outspoken on public health issues, he was perhaps best known for his work involving AIDS.
In 1988, he wrote a brochure about the disease that was distributed to 107 million homes in the United States.
Koop was also well-known for advocating a smoke-free society.
Before being appointed as surgeon general, Koop was a pioneer in the field of pediatric surgery as surgeon-in-chief at the Children’s Hospital of Philadelphia.
He attended Dartmouth College, Weill Cornell Medical College and the Perelman School of Medicine at the University of Pennsylvania.
“Dr. Koop did more than take care of his individual patients—he taught all of us about critical health issues that affect our larger society,” said Dartmouth President Carol L. Folt.
Koop died peacefully at his home in New Hampshire.