What is the biggest change in HIV medicine in the past 20 years?
D044966:Anti-Retroviral Agents / Q000266:history* / Q000627:therapeutic use; D015510:Clinical Medicine / Q000639:trends*; D015658:HIV Infections / Q000188:drug therapy / Q000266:history*; D049673:History, 20th Century; D049674:History, 21st Century; D006801:Humans
D044966:Anti-Retroviral Agents