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, whencliniciansshouldinstituteaggressiveanti-HIVtherapy. 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 …