Mark Harrington (HIV/AIDS activist)

Mark Harrington (born in 1959 or 1960) is an HIV/AIDS researcher, AIDS and tuberculosis activist, and the co-founder and policy director of the Treatment Action Group (TAG).

After graduating from Harvard University in 1983, Harrington moved to New York City. When many of his friends became infected with HIV, he joined the AIDS Coalition to Unleash Power (ACT UP). As part of ACT UP's Treatment and Data Committee, Harrington fostered relationships with government officials associated with AIDS research. Disagreements on how best to advocate for research led him and other ACT UP members to leave the organization and found TAG. With TAG, Harrington worked closely with the National Institutes of Health (NIH) and the Food and Drug Administration (FDA) to advance the development of antiretroviral therapy for HIV.

Over the years, Harrington has distinguished himself as a scientist and researcher in his own right and has worked to fight HIV/AIDS and tuberculosis in sub-Saharan Africa.