2. 3TC for 6 weeks. [AS PER AMENDMENT 9/15/97: If tolerated, infants continue on protocol treatment to 6 weeks of age. At 6 weeks, infants should receive standard care, including PCP prophylaxis, from an HIV specialist/pediatrician. HIV-infected infants are offered ACTG trial enrollment or open-label treatment based on best clinical judgment of their physician.] [AS PER AMENDMENT 2/19/99: Patients who prematurely discontinue study treatment should continue to be followed on study for the duration of the study.]