1854
Rock County was visited by a light choleraic epidemic
Rock CountyGrade A · 1 independent source
The evidence
“It was. most virulent in the autumns. Again in 1854 it was visited by a light choleraic epidemic, whichalso swept the state, assuming very generally a particularly mild type. Again in 1S57 it suffered lightly from the epidemic dysentery, which passed through the state.”
1879-history-of-rock-county/04-wisconsin-railroads-commerce-health-statistics.md, PDF p. 241 / book p. 245
Butterfield, C. W., et al. The History of Rock County, Wisconsin: its early settlement, growth, development, resources, etc. Chicago: Western Historical Company, 1879. Cornell University Library via the Internet Archive, archive.org/details/cu31924028871585.
Grade A: Found on a page of one of our sources