Academic Background: M.D., Harvard Medical School, 1967; M.H.S., Johns Hopkins University, 1973.
Research Interests: Nutritional epidemiology, vitamin A deficiency, and global health interventions.
Appointments: Professor Emeritus, Bloomberg School of Public Health; Former Dean, Bloomberg School of Public Health (1990–2005).
Awards: Lasker Award for Clinical Research (1997) for vitamin A discoveries.
Publications: Authored 'Vitamin A Deficiency: Health, Survival, and Vision' (Oxford University Press, 1996).
Additional Contributions: Advises global health organizations like WHO and UNICEF.