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The human immunodeficiency virus was discovered in 1984 .

人类1984年发现免疫缺陷病毒。

The cancer risk associated with viral load was lower than that associated with immunodeficiency , the researchers noted .

研究人员指出，肿瘤的患病风险相关的病毒载量相关性明显低于免疫缺陷程度。

1984 Retrovirus is discovered as cause of aids and later named human immunodeficiency virus or hiv .

1984年：逆转录酶病毒被发现湿艾滋的病原，后来被命名为免疫缺陷病毒或者hiv。

More than 40 simian immunodeficiency viruses are known to infect african primates .

能够侵染非洲灵长类动物的免疫缺陷病毒超过了40种。

The study authors also analyzed the association between immunodeficiency , viral load , antiretroviral treatment and the onset of the seven cancers .

该研究的作者还分析了免疫缺陷，病毒载量，抗逆转录病毒疗法和7个癌症的发生的相关性。