Children younger than 24 months or age, who meet all the inclusion criteria for army B must have plasma HIV-1 RNA levels less than 5 X 10(4) copies/ml while receiving optimal antiretroviral therapy, confirmed at least two different time points 2 to 4 weeks apart, showing no sign of increase (increment less than 0.5 log(10). If the child has been previously treated with antiretroviral drugs for more than 7 weeks (therefore not eligible for arm A) and is currently off drugs, he/she will have to be placed on optimal antiretroviral agents and will have to maintain viral RNA levels below 5 X 10(4) copies/ml prior to the entry.