Drug cocktail

Hi, my son Lucas is adopted. When we met him in the NICU he was getting prophylactic AZT and tested negative. A month after bringing home we had the test repeated and he had converted to HIV positive. When the test was repeated two weeks later his viral load had skyrocketed and he had some lymph node and spleen enlargement although his CD4 count was still normal. We started him on a cocktail of videx, viramune, and epivir 2 x day. The lymph nodes and spleen returned to normal, his CD4 count has always been normal, and his viral load became undetectable in a few months. It has been about a year that he has been undetectable (he's 21 mo old now). My question is, has anyone else had there viral load become undetectable? If you have, did it remain undetectable as long as you took your meds regularly?