HIV infection stems from few viruses

A new study reveals the genetic identity of human immunodeficiency virus (HIV), the version responsible for sexual transmission, in unprecedented detail.

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<p><a href="http://www.physorg.com/news130153062.html">HIV infection stems from few viruses</a></p> <p>A new study reveals the genetic identity of human immunodeficiency virus (HIV), the version responsible for sexual transmission, in unprecedented detail.</p>