We compared HIV antibody results between two of three treatment groups of the Children with HIV Early Antiretroviral Therapy ( CHER ) trial , done from July , @ , until July , @ , in which infants with HIV infection aged @-@ weeks with a percentage of CD@-positive T lymphocytes of at least @ % were randomly assigned to immediate ART for @ weeks ( ART-@W ) or deferred ART until clinical or immunological progression ( ART-Def ) .