Vaccines (thread 4), Episode 7: Remove the Pump Handle: John Snow’s Blueprint to Stop Measles

This episode applies 19th‑century physician John Snow’s investigative method to modern measles outbreaks, showing how mapping cases, tracing transmission, and acting on evidence can stop disease.

Snow’s approach—identify clusters, isolate the source, interrupt transmission—supports interventions (like vaccination requirements) as engineering solutions that prevent outbreaks rather than moral debates.