Dr. Mark Kaplan is the Chair of the Department of Microbiology and Immunology at Indiana University School of Medicine. He is currently the Editor-In-Chief for the American Association of Immunologists' journal ImmunoHorizons. Much of Dr. Kaplan’s work has focused on understanding the function of transcription factors in the development of T helper cell subsets. He talks about the role of T helper 9 cells in lung inflammation and γδ T cells in wound healing. He also discusses ImmunoHorizons and how it provides a home for solid immunological research that may otherwise remain unpublished.