David Da-i Ho is a Taiwanese-American physician-scientist and virologist known for his contributions to HIV/AIDS research. He pioneered the use of combination anti-retroviral therapy instead of single therapy in the treatment of HIV infection which transformed HIV from an absolute terminal disease into a chronic disease. Ho, a scientist, pioneered much of AIDS research. In 1996, he had announced that a medical trial of combination therapy had reduced the viral load in HIV-positive patients to levels too low to be measured, changing the disease profile from terminal to a manageable disease. Wiki link