Influenza is basically an extreme upper respiratory infection, and, by itself, is rarely fatal.
流感基本上是极端的上呼吸道的感染，它本身很少是致命的。
It is due to infection of human immunodeficiency virus after a fatal infectious disease.
它是由于感染了人类免疫缺陷病毒后引起的一种致死性传染病。
It is due to infection of human immunodeficiency virus after a fatal infectious disease.
它是由于感染了人类免疫缺陷病毒后引起的一种致死性传染病。
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