The Telephone Outreach for Therapy Trial was designed to test an intervention to assist new mothers or caregivers of HIV-exposed children with administering medication for the first 6 weeks of life to prevent mother-to-child HIV infection in the infants. To be eligible, mothers of infants were identified as HIV-infected in the Mother-Infant Rapid Intervention at Delivery Study. Mothers or caregivers of infants were randomized into two groups: the intervention group received a cellular phone and scheduled twice daily calls to assure infant medications were given, and the other group received the current standard of care. Enrollment into the study was completed and analysis of the study data is underway.