Robert McNeesThe Mexican-American microbiologist Sarah Stewart, a pioneer of viral oncology who showed that viruses could cause cancer in mammals, was born #OTD in 1905.
In 1944 she left her position at the NIH microbiology lab to become an instructor at Georgetown University Medical School, before woman were even admitted as students. In 1949 she became the first woman to receive their MD degree.
Image: Georgetown University News Service
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