PHSC 401 Lecture Notes - Lecture 5: Columbian Exchange, Herd Immunity, Edward Jenner

• School: University of Maryland
• Department: Public Health Science
• Course: PHSC 401
• Professor: Boyle

Document Summary

Vac = cow, originally was invented for cow pox. Hippocratic approaches: tend not to accept direct role for external forces in illness. Most diseases arose internally, from imbalances in humors: due to inherited propensities/lifestyle including diet and morality. External factors were secondary: ranged from spiritual to astrological, through seasonal and meteorological, or conditions in immediate bodily environment. Like great pox and plague in prompting rethinking of older models of influence and nature of disease: disease is an entity separate from individual affected, role of external forces. Could also be incorporated into humoral pathology: contagion: Causes stagnation of matter and perspiration under skin. Leads to eruptions such as small pox/measles: smallpox. A cleansing of the body from congenital impurity (of the blood?) Purgi(cid:374)g of a(cid:374)other pathologi(cid:272)al poiso(cid:374): purgi(cid:374)g (cid:449)as see(cid:374) as (cid:862)(cid:374)or(cid:373)al(cid:863) Nearly unavoidable: poisons already within the individual. Widely known that survivors of smallpox were later immune to disease and could not recontract.