I am Professor of Epidemiology with primary appointment in the Department of Epidemiology and a joint appointment in the Department of Immunology and Infectious Diseases, where my wet lab is located. I direct the Center for Communicable Disease Dynamics, a center of excellence funded by the MIDAS program of NIH/NIGMS. I am also the Associate Director of the Interdisciplinary Concentration in Infectious Disease Epidemiology.

Research (updating in progress)
My research concerns the effect of naturally acquired host immunity, vaccine-induced immunity and other public health interventions (e.g. antimicrobial use) on the population biology of pathogens and the consequences of changing pathogen populations for human health. Some of this work is motivated mainly by practical questions in public health (such as vaccine design and intervention targeting), and some is motivated by classical questions in population biology, such as how to explain patterns of coexistence of pathogen strains in space and time.