Patients enrolled in the National Institute of Allergy and Infectious Disease's trial, "Immunologic and Virologic Studies of Intermittent versus Continuous HAART [highly active antiretroviral therapy] in the Treatment of HIV Disease," may participate in this study. At periodic intervals for a total of 7 times during the 88-week trial, this companion study will require participants in both the interrupted and the continuous therapy groups to complete the following two questionnaires: