Amil Patel (left) and Bob Dunn run the front desk at this Walgreens pharmacy on the campus of the University of California, San Francisco. The store will be one of the first to take advantage of a new California law expanding pharmacists' scope of practice.
Dr. George Papanicolaou discovered that it was possible to detect cancer by inspecting cervical cells. The Pap smear, the cervical cancer screening test, is named after him.
American Cancer Society/AP