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What zoonotic diseases are, and how to stop them

NEW human pathogens arise in two ways. They may evolve from old ones, or they may jump to humanity from other species. The second is the more common route. Infections that jump in this way are called zoonotic diseases, or zoonoses. This seems to have been the route taken by Ebola fever, the latest outbreak of which has claimed more than 10,000 lives.

Ebola is suspected of being bat-borne, though that has yet to be proved beyond doubt. Bats also look like the origin of MERS, a viral illness that appeared in 2012 in the Middle East, and SARS, another virus, which burst upon the world from southern China at the end of 2002. HIV, meanwhile, came from other primates. The pandemic version,…

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Last Updated : Thursday, May 10, 2018