Esther Rosencrantz was ahead of her time as a doctor and tuberculosis researcher, but it was her research on her mentor, Sir William Osler, for which she is most remembered. Rosencrantz studied chest diseases with Osler at Johns Hopkins, the school he helped found, and graduated in 1904. She spent the next decade studying tuberculosis around the world, from New York to London, Berlin, and Paris, before becoming a professor at the University of California, San Francisco and head of the San Francisco Hospital tuberculosis clinic. She often visited patients at home, buying them food and medications. After WWI she joined the Red Cross Tuberculosis Commission in Italy for two years before returning to teaching. While she was a respected authority on tuberculosis, as well as a physician, teacher, and researcher, she devoted years to researching Osler who was called the father of modern medicine for creating the medical residency, where medical students learned by working with patients under supervision instead of abruptly switching from book learning to independent practice. Rosencrantz was forced into retirement in 1943, but continued her research until shortly before her death.
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Jewish Women's Archive. "Esther Rosencrantz." (Viewed on July 23, 2019) <https://jwa.org/people/rosencrantz-esther>.