The protective value of vaccine is 95%. It means
Correct Answer: 5 among 100 have the probability of getting infected after vaccination
Description: Vaccine is an immuno-biological substance designed to produce specific protection against a given disease
It stimulates the production of protective antibody and other immune mechanisms
Vaccines can be prepared from live modified organisms, inactivated or killed organisms, extracted cellular fractions, toxoids or combination of these
Vaccine efficacy is the percentage reduction of disease in a vaccinated group of people compared to an unvaccinated group, using the most favorable conditions
Vaccine efficacy was designed and calculated by Greenwood and Yule in 1915 for cholera and typhoid vaccines
It is best measured using double-blind, randomized, clinical controlled trials, such that it is studied under “best case scenarios
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