换句话说，博纳病毒在约4千万年前首次入侵了人类、猿和猴子的共同祖先。
In other words, borna virus first invaded the common ancestor of humans, apes and monkeys about 40 million years ago.
病毒常规基因序列表明与其它艾滋病病毒样本看上去不一样并且它最终与仅在2006年发现的一大猩猩猿免疫缺陷病毒比对。
Routine genetic sequencing of the virus showed it looked like no other sample of AIDS virus and it was eventually compared to a gorilla simian immunodeficiency virus, itself only discovered in 2006.
艾滋病被认为起源于非洲，那里的黑猩猩和猿携带了一种类似HIV的病毒，叫SIV(猴免疫缺陷病毒)。
AIDS is thought to have originated in Africa, where monkeys and apes harbor a virus similar to HIV called SIV (simian immunodeficiency virus).
他们得出这一结论的依据来自于对猿免疫缺陷病毒的观察。
They came to this conclusion by looking at those simian equivalents.
这项发现有希望产生治疗人和猿某些病毒性出血热的新药。
Discovery is expected to lead to new drugs for treatment of certain viral hemorrhagic fevers in humans and apes.
这和恒河猴短尾猿中的研究是鲜明的对比，恒河猴中持续的SIV复制以及因此而致的病毒高负荷和高水平的免疫激活并进展到AIDS相关。
This is in stark contrast to rhesus macaques, in which persistent SIV replication and resultant high viral loads are associated with high levels of immune activation and progression to AIDS.
这和恒河猴短尾猿中的研究是鲜明的对比，恒河猴中持续的SIV复制以及因此而致的病毒高负荷和高水平的免疫激活并进展到AIDS相关。
This is in stark contrast to rhesus macaques, in which persistent SIV replication and resultant high viral loads are associated with high levels of immune activation and progression to AIDS.
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