[1] The sister of famed historian of Nazism George Mosse, she, along with fellow psychiatrist Fredric Wertham, helped to form the Lafargue Clinic in Harlem, New York.
She shared Wertham's view that comic books were pathological influences on children, though was nowhere near as public a figure as her colleague.
She attended medical school at the University of Basel, and emigrated to the United States in 1939.
[2] In 1946, Mosse helped to found the Lafargue Clinic, a progressive, low-cost mental hospital for residents of Harlem.
She, along with Fredric Wertham, were the clinic's two main doctors.