While some research groups are conducting studies of vaccines that might be used in people who are already infected with HIV, the vaccines being tested by the HVTN are preventive vaccines.

有些研究组织研究疫苗，是可以用于已经感染HIV病毒的患者身上的；但是HVTN研究的是预防性的疫苗。

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While some research groups are conducting studies of vaccines that might be used in people who are already infected with HIV, the vaccines being tested by the HVTN are preventive vaccines.

有些研究组织研究疫苗，是可以用于已经感染HIV病毒的患者身上的；但是HVTN研究的是预防性的疫苗。

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