17/12/2025
🌊 Throwback Thursday: The Pump That Changed the World
London, 1854.
A deadly cholera outbreak was sweeping through Soho, killing hundreds within days. Theories about the cause were everywhere “bad air,” curses, even divine punishment.
But one doctor wasn’t convinced.
Dr John Snow (and no, not the one from Game of Thrones 😅) had a hunch that the disease was spreading through contaminated water, not the air.
Armed with observation, logic, and a hand-drawn map, he plotted every case of cholera in the neighbourhood.
The pattern was undeniable, they all clustered around a single water pump on Broad Street.
Snow convinced local authorities to remove the pump handle.
Within days, the outbreak stopped.
That simple act, one map, one pump, one bold decision, became one of the most important breakthroughs in medical history.
This was the birth of modern epidemiology, the science of tracing, tracking, and preventing disease. Snow proved that data, observation, and courage could save lives long before microscopes could even see bacteria.
💬 One pump handle. One insight. One man who changed how we fight disease forever.