Medecins Sans Frontieres estimates that 240,000 people are currently infected with H.I.V. in Myanmar and that 76,000 are in urgent need of antiretroviral drugs. At left, a 29-year-old man sits in his home. He learned that he was HIV-positive when he was tested for tuberculosis. His wife and their son are also HIV-positive. However, they have enough money only for him to begin antiretroviral treatment (ART).