Swimming in Lake Malawi and Schistosomiasis

Sally Kohn: I want to talk about swimming in Lake Malawi and getting schistosomiasis. She says people come back from traveling to that part of the world and they have a cute fever, headache or something like that. But at the same time, she says, you should just maybe practice harm reduction and go in the water. The most diverse lake on the planet has the most different numbers of species of fish.