It's the immune system, stupid.
D000818:Animals; D019380:Anti-HIV Agents / Q000627:therapeutic use*; D004359:Drug Therapy, Combination; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D015658:HIV Infections / Q000188:drug therapy* / Q000276:immunology*; D006801:Humans; D006918:Hydroxyurea / Q000627:therapeutic use*; D015302:Simian Immunodeficiency Virus / Q000187:drug effects; D013997:Time Factors; D019562:Viral Load
D019380:Anti-HIV Agents; D004791:Enzyme Inhibitors; D006918:Hydroxyurea