Health
Health, 09.07.2019 05:20, emurray

Amedical study was investigating if getting a flu shot actually reduced the risk of developing the flu. from a group of adult volunteers, researchers randomly assigned half to receive an injection that contained the drug believed to reduce the risk of getting the flu and the other half to receive an injection containing no active ingredient (i. e. sugar water). what type of study is being performed?

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