The Outbreak Begins
What deadly disease struck London in 1854?
What is Cholera?
Who worked with John Snow to gather evidence?
What is Reverend Henry Whitehead
What did Snow’s famous map show?
What is Deaths clustered around Broad Street
Where was human waste usually dumped?
What is Cesspools & Thames
What marks the Broad Street pump today?
What is Memorial pump without handle
What false theory did most Londoners believe caused cholera?
What is Miasma theory (bad air)
What did Snow do to the Broad Street pump?
What is Removed the handle
Why was the map so persuasive?
What is It visually proved the pump was the source
What system was eventually built to stop outbreaks?
What is Sewer system
What does the missing pump handle symbolize?
What is Science over superstition
Cholera could kill someone within how many hours?
What is 24–48 hours
What science was born from Snow’s work?
What is Epidemiology
How did the map change public health thinking?
What is Linked data & geography to disease
Why is waste management vital for health?
What is Clean water prevents disease
How does Johnson connect Snow’s work to modern times?
What is Data + maps + cities
What visible signs did cholera victims often show on their bodies?
What is Sunken eyes, blue lips, shriveled skin from dehydration
What method did Snow use to prove his case?
What is Mapping and interviews
What tool do we still use today that Snow pioneered?
What is Mapping disease
Which government field grew because of sanitation?
What is Public health
What else, besides disease, spreads fast in cities?
What is Ideas and innovation
Why were London’s crowded conditions perfect for disease?
What is Overcrowding + cesspools + poor sanitation
Why was Snow’s theory controversial?
What is It challenged miasma theory
What unusual case on Snow’s map helped prove cholera came from water, not air?
What is The brewery workers near Broad Street who drank only beer and didn’t get sick.
How did sanitation transform cities over time?
What is Cities became healthier than rural areas
What is the key lesson from Broad Street?
What is Science + data + infrastructure