Why Cholera Was So Deadly in 1800s England

Five Interlocking Factors

1. Abysmal Sanitation – Open sewers, cesspools, contaminated Thames; no sewage treatment.
2. Scientific Ignorance – Miasma theory prevailed; germ theory not accepted. John Snow's 1854 Broad Street pump investigation was pivotal but initially rejected.
3. Inadequate Infrastructure – Overcrowded slums, no clean water supply, poor housing.
4. Global Trade/Travel – Ships carried cholera from endemic India to British ports repeatedly.
5. Extreme Poverty – Malnutrition, lack of healthcare, inability to avoid contaminated water.

Turning Point

Snow's epidemiology + Bazalgette's sewer system (1860s) + germ theory acceptance ended epidemic cholera in London. A landmark in public health history.