Inclusion Criteria

Patients may be eligible for this study if they:

• Are 2 to 18 years of age.
• Are HIV-infected.
• Have a viral load (amount of HIV in the blood) under 60,000 copies/ml within 30 days of study entry.
• Have been on their current anti-HIV drugs for at least 3 months.
• Have received 4 or more doses of a pertussis vaccine.
• Have received 1 or more doses of measles vaccine unless a CD4 percent or CD4 number ruled out taking the vaccine. (This reflects a change in the CD4 requirement.)
• Expect to be able to complete all study injections and follow-up.
• Have a negative pregnancy test if able to have children and use effective methods of birth control.
• Have parent or guardian's consent if under 18 years of age.
• Have received an approved hepatitis B vaccine series. Not required for study entry, but children who have received this vaccine will be studied.
• (This study was changed to allow patients who became HIV infected after birth, have a viral load between 30,000 and 60,000 copies/ml, and who have been on their current anti-HIV drugs for 3 to 6 months.)

Exclusion Criteria

Patients will not be eligible for this study if they:

• Had a certain CD4 level before beginning anti-HIV drugs and at screening.
• Have received any killed vaccine within 4 weeks, or any live vaccine within 6 weeks, of entering the study.
• Have received pneumococcal vaccines or had a reaction to PPV.
• Have had an allergic reaction to any measles or hepatitis B vaccines, or to other routine childhood immunizations if 13 years of age or less.
• Have any other condition that would make receiving study vaccines inadvisable.
• Are currently on medications that affect the immune system, except for G-CSF and erythropoietin. This includes the equivalent to more than 1 mg/kg/day of prednisone in the 2 weeks preceding study screening. Nonsteroidal anti-inflammatory agents and inhaled corticosteroids are not excluded.
• Have received certain blood products within the previous 6 months.
• Have other diseases of the immune system.
• Have had cancer within 3 months of study screening or are being treated or have been treated for cancer within 3 months of study entry.
• Are pregnant.
• Have any other disease or previous surgery that would interfere with study treatment.
• Are likely to have bleeding disorders.
• Show certain side effects to vaccines at screening.