Doreen Ramogola-Masire, an obstetrician-gynecologist in Botswana, hopes that a simple, quick screen for cervical cancer with vinegar will catch the disease early and save women's lives. Jason Beaubien/NPR hide caption

toggle caption Jason Beaubien/NPR

Before the colonoscopy begins, it pays to ask your doctor some pointed questions. Sebastian Schroeder/ hide caption

toggle caption Sebastian Schroeder/

Cells gathered during a Pap test. Those on the left are normal, and those on the right are infected with human papillomavirus. Ed Uthman/Wikimedia Commons hide caption

toggle caption Ed Uthman/Wikimedia Commons

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