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John S Marr

John S. Marr M.D., M.P.H., served as director and principal epidemiologist for the New York City Department of Health. The Eleventh Plague is his fifth book. He is the coauthor (with Gwyneth Cravens) of The Black Death and is the author of three books for children on public health concerns, drugs, smoking, and proper nutrition. The author of more than fifty medical journal articles on communicable diseases and emerging infections and a frequent op-ed contributor to the Medical Herald , Marr is...See more