Branch links a health practice to the field of medicine it grew out of. Wikipedia describes Ignaz Semmelweis as "an early pioneer of antiseptic procedures" whose hand washing requirement began inside obstetrics, the branch where childbed fever was killing new mothers. This dimension groups practices that belong to the same branch of health work.
Facts
Comparison
Era of EmergenceSourced to the subject's own account Branch
Sources
1. Wikipedia: Vaccination
WikipediaVaccination, History sectionQuote, Vaccination, History section
In 1796, Edward Jenner, a doctor in Berkeley in Gloucestershire, England, tested a common theory that a person who had contracted cowpox would be immune from smallpox.
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