John Swartzberg, MD, is a clinical professor emeritus at UC Berkeley's School of Public Health, chairs the editorial board chair BerkeleyWellness.com and has directed coverage at the Berkeley Wellness Letter since 2001. He is also past director of the UC Berkeley–UCSF Joint Medical Program. Swartzberg is board certified in internal medicine and infectious diseases. Before joining UC Berkeley's faculty full time in 2001, he spent 25 years in clinical practice. He is also the hospital epidemiologist and chair of the infection-control committee at the Alta Bates Medical Center in Berkeley and teaches a two-semester graduate course in infectious diseases at UC Berkeley. He has collaborated with the late Sheldon Margen, a pioneer in nutritional sciences and co-founder of the Wellness Letter, on the highly successful Wellness Self-Care Handbook in 1998 and the Complete Home Wellness Handbook in 2001.