Thomas Francis and Ruth Reardon O'Brien

Common card · No. 233651

Thomas Francis O'Brien (January 28, 1929 – December 9, 2024), a professor and microbiologist, and Ruth Reardon O'Brien (née Reardon; December 16, 1931 – December 12, 2024), an attorney, were an American couple who were the parents of television host and comedian Conan O'Brien. Thomas was a microbiologist at Harvard Medical School who was known for his work in antimicrobial resistance; he was also the co-founder of the World Health Organization's Collaborating Center for Surveillance of Antimicrobial Resistance and the creator of the medical database WHONET. Ruth was the second female lawyer to become a partner at Ropes & Gray; there, she was an attorney for its real estate department.

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