the parents of comedian and late night host Conan O'Brien, have died. Thomas, an epidemiologist, was 95, and Ruth, a lawyer, was 92. Dr. O'Brien died Monday and Mrs. O'Brien died Thursday.

The comedian's dad, Dr. Thomas F. O’Brien, passed away Dec. 9 at age ... Their father, a physician, epidemiologist and Harvard professor, cofounded the World Health Organization’s ...