What are signs of swine flu in pigs?

被感染了猪流感的猪有何症状？

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What are the signs and symptoms of swine flu in people?

人感染猪流感，会出现何种迹象和症状？

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What are the signs and symptoms of swine flu in people?

人感染猪流感，会出现何种迹象和症状？

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