Diseases that jump from animals to humans
A death suspected to have been caused by the Ebola virus has reported in the Democratic Republic of Congo. Ebola is just one example of a zoonotic virus -- one that can jump from animals to humans. The phenomenon of "animal to human" disease transmission is the subject of an article in the October issue of National Geographic Magazine. Marco Werman talks with science journalist David Quammen, who wrote the piece.

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