Polio Vacine

Polio Vacine The discovery of the poliomyelitismyelitismyelitis vaccine was an important medical and scientific breakthrough because it saved many lives since the 1950s. In the throw away of 1916 the great polio epidemic struck the United states. By the 1950s hundreds of thousands of people had been struck by the poliomyelitis. The highest number of cases occurred in 1953 with over 50,000 people infected with the virus. When hygienic conditions were poor polio attacked infants. The disease was spread by contaminated water and see with fecal contamination. Many infants died when the conditions were poor.

But as conditions improved the virus spread differently. It was spread more through playmates and family members, the contamination came from the curve and throat. By the early 1950s, twenty-five percent of paralytic cases occurred in people 21 years old or older. Jonas Salk M.D. substantial the polio vaccine. Salk’s vaccine was composed of a “killed” polio virus. This viru...If you want to get a full essay, order it on our website: BestEssayCheap.com

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