The following text discusses epidemiology.
The 1854 Broad Street cholera outbreak in London killed over 600 people before physician John Snow traced its source. By mapping cases, Snow discovered they clustered around a single water pump. When authorities removed the pump's handle, the outbreak declined. Snow's work established a foundational principle of epidemiology: diseases spread through identifiable pathways that can be interrupted. His methods—careful observation, data visualization, and targeted intervention—remain central to public health practice today.
Why is John Snow's cholera investigation historically significant?
He discovered a cure for cholera
He established methods and principles still used in public health
He proved that diseases cannot be prevented
He invented the modern water pump
Correct Answer: B
Choice B is the correct answer. The text states Snow established "a foundational principle of epidemiology" and his methods "remain central to public health practice today."
- Evidence: Foundational principle; methods still used.
- Reasoning: Lasting impact on public health methodology.
- Conclusion: His work shaped modern epidemiology.
Choice A is incorrect because he traced the source, not cured the disease. Choice C is incorrect because he proved diseases CAN be prevented by interruption. Choice D is incorrect because he disabled a pump, not invented one.