NEW STUDIES about events early in the course of infection with the human immunodeficiency virus (HIV) may have important implications in treating the infection, namely, when clinicians should institute aggressive anti-HIV therapy. Results of these studies and other findings, including information about the emergence of unusual adverse effects in patients treated with protease inhibitors and the earliest evidence about when HIV infection appeared in the human population, were among the discoveries reported at the Fifth Conference on Retroviruses and Opportunistic Infections held in Chicago, Ill, last month.
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