Tregs are an exciting subset of T cells, a type of white blood cell, that maintain immune tolerance, modulating your immune function. Harkamal (Hark) Jhajj, Postdoctoral FellowHow have your previous work and personal experiences shaped your approach to your work today? Credit: Harkamal (Hark) Jhajj2/3 Hark poses at his favorite U.S. National Park: Glacier National Park. Credit: Harkamal (Hark) Jhajj3/3 Hark captured one of the beautiful turquoise lakes at Glacier National Park. Harkamal (Hark) Jhajj, Postdoctoral FellowIt’s also why I am passionate about working on the immune system.