Until recently, the majority of medical research and clinical drug trials were conducted on men. Before the turn of the century, a woman's normal physiology was regarded as pathologic. African-Americans who sought medical treatment were relegated to segregated facilities with blatantly inferior care. The Tuskegee project is one of several exploitative research projects conducted on African-Americans. Progress has been made.
Segregation is a thing of the past.
Clinical researchers make efforts to include both women and men in their studies. My experiences have been much less dramatic. I have encountered the occasional patient who is troubled by my presence and stares perplexedly and ignores my extended hand, but this eventually resolves into an awkward acceptance of my role. I bet you can hardly wait to get out of medical school and serve your people in the inner city. I worry that my student ID card will wear out early.