Risk of developing drug resistance after stopping antiretroviral regimens to prevent mother-to-child HIV-1 transmission is unknown. The Mma Bana Study randomized treatment-naive pregnant women with CD4 ≥200 cells per cubic millimeter to receive either abacavir/zidovudine/lamivudine [triple nucleoside reverse transcriptase inhibitor (NRTI) arm] or lopinavir/ritonavir/zidovudine/lamivudine [protease inhibitor (PI) arm]. Drugs were discontinued after 6 months of breastfeeding.
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