Snow's Theory of Cholera

Snow's Theory of Cholera proposed that the disease was caused by a specific infectious agent, not miasma or bad air. He identified contaminated water as the source of cholera transmission, demonstrating that people drinking from a polluted water pump in London experienced higher infection rates. By mapping cases, he linked the outbreak to a particular water source, leading to the conclusion that cholera spread through contaminated water. This marked a significant shift in understanding infectious diseases and emphasized the importance of sanitation and clean water in preventing outbreaks.