Malaria is an annual production of nearly every section of the United States. No State is entirely free from it. The Western States for well-known reasons, have gained considerable notoriety for the number and frequency of Malarial diseases within their borders. These diseases in Michigan, among natives, are of the mildest forms, much milder than those on the Chesapeake peninsula, to say nothing of the severer forms seen on the Virginia low lands, or in the Carolinas.

–Magnetic & Mineral Spring of Michigan,
to which is
Prefixed an Essay
on the
Climate of Michigan

by Stiles Kennedy, MD

James & Webb, Wilmington, Delaware

1872
(See also “Malaria in the USA, 1870“)