Joseph Eisenberg studies infectious disease epidemiology with a focus on waterborne and vectorborne diseases. He is interested in the environmental determinants of infectious diseases, and currently has a project in Ecuador studying how changes in the social and natural environment, mediated by road construction, affect the epidemiology of pathogens causing diarrheal diseases. Dr. Eisenberg's domestic interest focuses on the development of a new microbial risk assessment framework that shifts the traditional approach of individual-based static models to population-based dynamic models. In coordination with the Environmental Protection Agency (EPA), this work has led him to apply these disease transmission models to assess the public health risk from exposures to microbial agents in drinking waters, recreational waters, and biosolids.