随着感染逐渐削弱人体免疫系统，可能会出现其它体征和症状，如淋巴结肿大、体重减轻、发热、腹泻和咳嗽等。

As the infection progressively weakens the person's immune system, the individual can develop other signs and symptoms such as swollen lymph nodes, weight loss, fever, diarrhoea and cough.

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许多猪没有症状，但另一些则出现急性发热病症，呼吸困难和神经症状，如颤抖，抽搐和肌肉痉挛等。

Many pigs had no symptoms, but others developed acute feverish illness, laboured breathing, and neurological symptoms such as trembling, twitching and muscle spasms.

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对儿童来说，这些症状包括呼吸困难；皮肤颜色变青；流感症状开始改善，然后又出现发热和咳嗽加剧；以及伴有皮疹的发热等。

In children, those signs include difficulty breathing; bluish skin color; flu symptoms that begin to improve, then return with fever and worse cough; and fever with a rash.

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