http://www.bbc.co.uk/news/science-environment-20341423
Recently, Ebola has reinfected people in Uganda, which had previously declared itself Ebola free. Canadian researchers have discovered that Ebola can be hosted in pigs, who can then spread it to other animals, such as monkeys, by just being in a close proximity to them. Scientists think that it spreads via aerosol droplets from the pigs lungs that can survive in the air for a brief amount of time, and may be reabsorbed by another animal, therefore spreading the disease.
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