STEP II: Patients stop study medications and interrupt potent antiretroviral therapy for [AS PER AMENDMENT 08/23/01: "6 to 16" has been replaced by the following text: a minimum of 12] weeks. Patients whose viral load during Step II remains [AS PER AMENDMENT 08/23/01: at or] below 5,000 copies/ml [AS PER AMENDMENT 08/23/01: and whose CD4 count is 200 cells/mm3 or more] are encouraged to remain off antiretroviral medications and continue viral-load monitoring for up to an additional 10 weeks. These patients are followed [AS PER AMENDMENT 08/23/01: "for up to 16 weeks" has been replaced by the following text: through Week 74] on Step II and must register to Step III only if their viral load increases to 50,000 copies/ml or greater, their CD4 count decreases to below 200 cells/mm3, or if their primary care physician recommends resuming antiretrovirals.