Dr. Lillian Cohn is an immunologist who studies latent HIV infection. Her work analyzes the biology of reservoirs of HIV-infected CD4+ T cells that quietly persist despite continuous antiretroviral therapy. Because these cells proliferate and can start producing new virus in the absence of such drugs, there is no cure yet for HIV. Dr. Cohn uses advanced techniques to understand the various mechanisms that cause populations of latently infected cells to expand and reactivate, in hopes of finding ways to stop that process permanently and effectively cure the disease.