Tatenda Yemeke spent the summer working on mental health issues in Cape Town: "I lived with a Muslim family and they helped me learn about local culture." Courtesy of Tatenda Yemeke hide caption

itoggle caption Courtesy of Tatenda Yemeke

Pauline Cafferkey is now in isolation at the Royal Free Hospital in North London, where she was treated in January for Ebola. Justin Tallis/AFP/Getty Images hide caption

itoggle caption Justin Tallis/AFP/Getty Images

When Dr. Boie Jalloh got the call to join the fight against Ebola in Sierra Leone, his friends told him he'd be crazy to sign on. It's a good thing he didn't listen. Aurelie Marrier Dunienville for NPR hide caption

itoggle caption Aurelie Marrier Dunienville for NPR

Sen. Charles Grassley, R-Iowa, and a Democratic colleague have introduced a bill that would require drugmakers and medical device companies to disclose payments made to physician assistants and nurses who can prescribe their products. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images

Image of a mini-kidney formed in a dish from human induced pluripotent stem cells. Minoru Takasato/Nature hide caption

itoggle caption Minoru Takasato/Nature