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Double-blinded studyA medical study in which both the subjects participating and the researchers are uaware of when the experimental medication or procedure has been given. Double-blinded studies are often used when initial studies shows particular promise.
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Double-blinded studya study in which neither the investigator nor the participant knows whether the participant is receiving a vaccine or a control. Double-blinded studies are designed to prevent bias when conducting the trial or analyzing the results.
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