As human activity ventures further into the wilderness, scientists believe more diseases will emerge. CNN Senior International Correspondent Sam Kiley takes Sanjay on a journey deep into the rainforests of the Democratic Republic of the Congo, where the hunt for the next pandemic pathogen continues. To learn more about how CNN protects listener privacy, visit cnn.com/privacyLearn more about your ad choices. Visit podcastchoices.com/adchoices