Which animal?
While some sea-going mammals can carry coronaviruses (such as the Beluga whale), the South China Seafood Wholesale Market also has live wild animals, including chickens, bats, rabbits, snakes, which are more likely to be the source.
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Researchers say the new virus is closely related to one found in Chinese horseshoe bats.
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However, this does not mean wild bats are the source of the outbreak – they could have passed the virus onto another species sold at the market.
Adapted from BBC