PCR tests like this can tell if a virus is an enterovirus, but they can't ID the new virus that has caused a surge in serious respiratory infections. BSIP / Science Source hide caption

itoggle caption BSIP / Science Source

She's a mother talking to another mother — and both are HIV-positive. That's the mentoring role played by Phelokazi Tinzi, who works for mothers2mothers in South Africa. Anders Kelto/NPR hide caption

itoggle caption Anders Kelto/NPR

Not every business has been hurt by the Ebola epidemic: Stephen Kollie says his newspaper stand is thriving because people are hungry for the latest Ebola information. But many of his usual expatriate customers have left the country, he says. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR

Mountains of "little blue pills" and their chemical kin have transformed the way many people think about sex and aging. Raphael Gaillarde/Gamma-Rapho/Getty Images hide caption

itoggle caption Raphael Gaillarde/Gamma-Rapho/Getty Images

Randen Patterson left a research career in physiology at U.C. Davis when funding got too tight. He now owns a grocery store in Guinda, Calif. Max Whittaker/Prime for NPR hide caption

itoggle caption Max Whittaker/Prime for NPR

Alieu P. Manor, 18, survived Ebola. He gazes into the room of his cousin, Varlee Kanneh, who was not so lucky. Tommy Trenchard for NPR hide caption

itoggle caption Tommy Trenchard for NPR