1916 New York City polio epidemic
The 1916 New York City polio epidemic was an infectious disease epidemic of polio ultimately infecting several thousand people, and killing over two thousand, in New York City, primarily in the borough of Brooklyn. The epidemic was officially announced in June 1916, and a special field force was assembled under the authority of Dr.
Source: Wikipedia — 1916 New York City polio epidemic (CC BY-SA 4.0)