The 13 cases, many of them linked to one Saudi hospital, suggest that the spread of this coronavirus may have reached a dangerous new stage in which it is spreading from one human to another, rather than infecting humans from another source such as an infected animal, according to infectious-disease experts.

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Vegetables that grow on the ground are more likely to be contaminated with bacteria, since runoff from animal waste is likely the source of contamination.

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It is probable that it has an animal source, but whether it spreads from contaminated food or something else in the environment is unknown.

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The RSPCA confirmed the animal as a coati after viewing material from another source.

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