Researchers conducted a study to determine whether receiving two doses of the shingles vaccine was associated with a decrease in shingles in older adults. They recruited 500 adults with a history of shingles and 700 adults without a history of shingles living in South Carolina. Shingles vaccine histories for all participants were obtained from medical records. ______________________________________________________ Researchers were hoping to minimize which type of bias by using medical records to obtain vaccine information instead of interviewing the participants?
[Verified Answer]: Researchers conducted a study to determine…
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