The virus becomes HIV-1 the most widespread form found today.
该病毒成为今天最广为传播的形式：HIV - 1。
The fifth was the chimpanzee virus that is the direct ancestor of HIV-1.
第五个是HIV - 1型病毒的先祖黑猩猩病毒。
The HIV-1 virus, seen here, is the most common (and deadliest) strain of the disease.
这里所看到的HIV - 1病毒是最常见和最致命的疾病菌株。
For example, around a half of HIV positive Americans report recent use.1.
例如，在美国有近半数HIV阳性的患者称最近曾使用过。
HIV-positive children less than 1 year old.
HIV阳性的不足1岁的儿童。
HIV-positive children less than 1 year old.
HIV阳性的不足1岁的儿童。
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