Professor Snowden received his B.A. from Harvard in 1968, and his B.Phil and D.Phil. from Oxford University in 1972 and 1975. He has taught at London University from 1978 until 1991 and at Yale since 1991. His research interests include: the comparative history of epidemic diseases; the history of public health; the impact of emerging and resurgent diseases; issues in medical ethics; and bioterrorism. He is currently Chair of the Program in the History of Science and Medicine.
His teaching areas are the history of infectious diseases, the history of public health, and the intellectual history of medicine.