Origin year places a health practice in the year it was first adopted. Wikipedia records that after Semmelweis introduced hand washing in 1847, "the maternal mortality rate dropped from 18% to less than 2%" on his ward almost immediately. Browsing by origin year shows how long a practice a visitor takes for granted has actually been in use.
Facts
Comparison
Era of Emergence 1980s
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Sources
1. Wikipedia: History of malaria
WikipediaHistory of malaria, Panama Canal sectionQuote, History of malaria, Panama Canal section
Mosquito control instituted by William C. Gorgas dramatically reduced this problem.
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