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A chimpanzee eats a nut in its enclosure at the zoo in Hanover, northern Germany, on December 19, 2017. (PHILIPP VON DITFURTH/AFP/Getty Images)

A chimpanzee’s life is far from simple: these highly social and intelligent creatures face any number of human and natural threats to their existence. From habitat loss and poaching to predation and Ebola, which has wiped out an estimated third of all chimpanzees, a host of perils lie in wait for these great apes, currently classified as endangered.

Their fragile status makes the findings of a recent CDC study all the more compelling and crushing: published in the Emerging Infectious Diseases journal in December, the study indicated the human cold virus was responsible for a deadly 2013 respiratory disease outbreak that killed five chimps in Uganda’s Kibale National Park.

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