Read MoreAt least two gorillas began coughing last week while a third is showing symptoms and five others could also be infected.At least two gorillas began coughing last week while a third is showing symptoms and five others could also be infected.

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Read MoreAt least two gorillas began coughing last week while a third is showing symptoms and five others could also be infected.At least two gorillas began coughing last week while a third is showing symptoms and five others could also be infected.