Individuals entered in the study are given ampligen by intravenous infusion once during the first week of the trial and twice a week during the following 8 weeks. The dose each individual receives is determined by the responses of earlier individuals. Each is followed for 12 weeks after the last dose of ampligen is given. Each individual maintains a daily diary listing any symptoms or problems that occur, such as headache, nausea, or change in appetite. Other anti-HIV drugs cannot be taken during the trial, and aspirin or acetaminophen should not be taken for more than 2 hours without consulting the research staff. Blood is drawn at intervals during the trial and follow-up and used to determine the effect of ampligen on the HIV and the immune system as well as to monitor any toxicity and side effects.