In the intervention group, effects of adherence (weaning at 4 months) on HIV transmission and uninfected child mortality stratified by the severity of maternal HIV disease during pregnancy.

*Less severe disease was defined as CD4 counts >350 cells/µL during pregnancy or if between 200 and 349 cells/µL had to be classified as WHO stage II or less; more severe disease was defined as CD4 count <200 cells/µL or if CD4 count 200–349 cells/µL had to be classified as WHO stage III or greater.
**Adherent was defined as stopping all breastfeeding by the completion of 4 months.