Dr. Hadler’s main research interests are in the epidemiology, prevention and control of infectious diseases of public health importance in the U.S. For 25 years, from 1984-2008, he was the Connecticut State Epidemiologist and director of the state’s infectious disease surveillance and control programs. In that capacity he lead investigations into many infectious disease outbreaks and emerging infectious disease problems such as HIV, multidrug-resistant tuberculosis, West Nile virus, anthrax, SARS, shiga-toxin producing E. coli and MRSA, and evaluated the impact of new vaccines on the epidemiology of their target diseases.