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Polio, short for poliomyelitis, is a viral infectious disease that mainly affects young children. It can lead to paralysis, primarily of the legs. Thanks to widespread vaccination efforts, polio has been eradicated in many parts of the world, although it remains endemic in some countries.

The Nipah virus was first identified in 1999 during an outbreak in Malaysia and Singapore. It's named after the village in Malaysia where the first outbreak occurred. The virus is believed to be originally hosted in fruit bats and can spread to humans through contact with infected animals or consumption of contaminated food.

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