Until age 16, Vasen attended public school in Quincy. After finishing her public school education, Vasen began studying with Dr. Melinda Knapheide-Germann. Knapheide-Germann was one of the first female doctors to practice medicine in Quincy. Vasen trained with Knapheide-Germann for the next two years. In 1890, Vasen began studying medicine at the
Keokuk College of Medicine. Keokuk was the first coeducation American medical college specializing in gynecology and obstetrics practices. She graduated on March 8, 1892, the first Jewish female graduate in the college history. In 1897, Vasen enrolled in postgraduate training in obstetrics in Philadelphia. During this time, Vasen began a physician and then the superintendent at the Jewish Maternity House. == Medical career ==