Hannah Bloch

Three years ago, we published a story about a small start-up in Kigali, Rwanda's capital, that was seeking to make homes more sanitary by replacing dirt floors with sealed earthen floors, which are up to 80 percent cheaper than concrete.

Sister Fa is a Senegalese-German rap star. Leyla Hussein is a Somali-born, London-based documentary filmmaker and psychotherapist. Their day-to-day lives are different, but they have a great deal in common.

"We're both survivors of FGM," Hussein explains. "We both have daughters and we didn't cut our daughters."

Checking into a hospital can boost your chances of infection. That's a disturbing paradox of modern medical care.

"Now we're in it."

That's what Liberian health worker Lorenzo Dorr tells me. The first two cases of Ebola have been confirmed in Grand Gedeh County, in Liberia's southeast, where Dorr is based.