John Snow’s Map, Which Changed the Way We Understand Epidemics

The disease would change the course of Soho, then the most densely populated area of London, forever. But the outbreak would also be followed closely by John Snow. His map on how the disease spread in 1854 led him to become the father of modern epidemiology.
— Read on blog.ferrovial.com/en/2020/05/john-snows-map-which-changed-the-way-we-understand-epidemics/