John Snow was the first person to use maps and data records to track the spread of a disease back to its source. His innovative methods provided a foundation for modern epidemiology and have been used to quell many potentially catastrophic outbreaks, likely saving millions of lives. Read more: https://www.humanprogress.org/heroes-of-progress-pt-45-john-snow/ | HumanProgress.org

16K views · 668 reactions | Physician John Snow famously figured out the cause of a cholera outbreak using maths and statistics. James Grime tells us what happened, walking those very same streets. | Royal Institution of Great Britain | Facebook