Mark Harrington (Born in 1959/1960, in San Francisco) is an HIV/AIDS researcher, a staunch activist for HIV/AIDS and tuberculosis awareness, and the co-founder and policy director of the Treatment Action Group (TAG). After graduating from Harvard University in 1983, Harrington spent time exploring and did not commit to one specific career. When the AIDS epidemic became personal for Harrington, and close friends were being infected with HIV (he himself was diagnosed in 1990), he decided to take action and joined the group, AIDS Coalition to Unleash Power or ACT UP. As part of the Treatment and Data Committee of ACT UP, Harrington fostered relationships with government officials associated with AIDS research. Eventually differences in opinions on how to best advocate for HIV/AIDS research le