National Public Health Week 2025 Day 3: Public Health Made Water Safe: John Snow & Epidemiology

Clean water is one of the greatest public health achievements of all time — but it wasn’t always guaranteed. In this episode of What is Public Health, in this special series "How we built healthier communities", I explore how contaminated water once fueled deadly epidemics, how Dr. John Snow’s cholera investigation in 1854 laid the foundation for modern epidemiology, and how today’s policies…