Dr Walsh received an undergraduate degree in Chemistry from Manhattan College and an MD degree from SUNY-Downstate Medical Center in 1974. He completed his residency at the URMC Strong Memorial Hospital in 1977 and a fellowship in Infectious Diseases in 1982. Since then he has been faculty in the Department of Medicine and a member Infectious Diseases division at the University of Rochester. Dr Walsh is head of the ID unit at Rochester General Hospital where his clinical activities and research activities are based.