A 27-year-old woman is diagnosed with HIV and is seen in an HIV clinic 3 days later to discuss starting antiretroviral therapy. She has one male partner who has also been diagnosed with HIV. They do not consistently use condoms, and they are interested in having a child together. Baseline laboratory studies show HIV RNA of 61,280 copies/mL, CD4 count of 534 cells/mm³, and a negative HLA-B*5701 test. She has never taken HIV preexposure prophylaxis.