Four different ebolaviruses are scattered variously across Central Africa and have emerged from their reservoir hosts to cause human disease (as well as gorilla and chimpanzee deaths) in six different countries: South Sudan, Gabon, Uganda, Côte d’Ivoire, the Republic of the Congo, and the Democratic Republic of the Congo. A fifth ebolavirus seems to be endemic to the Philippines, and to have traveled from there several times to the United States in infected macaques.
