two John Snows (John Snow the physician and John Snow the Australian epidemiologist)

John Snow (1813-1858) was a British physician known as one of the founders of modern epidemiology. He is famous for his work on cholera, particularly during the 1854 outbreak in London, where he mapped cases and identified a contaminated water source, demonstrating the importance of clean drinking water. The other John Snow is an Australian epidemiologist who has contributed significantly to the field of public health and disease prevention, particularly in infectious diseases and vaccination. His work helps inform policies to better control outbreaks and improve health outcomes in communities. Both have profoundly impacted public health and epidemiology.