The source of Middle Eastern Respiratory Syndrome, the reason it emerged when it did and how serious the threat will become are some of the questions an international team of scientists is trying to answer amid fears MERS could become the next pandemic. It's thought that bats harbor the coronavirus and transmit it to another species that then exposes humans. Gaining an understanding of the animal-human links in MERS may offer insights into how to prevent future outbreaks of zoonotic disease, experts said.

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