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Social & Preventive Medicine Screening 9d8217ab

ELISA is performed on a population with low prevalence, What would be the result of performing double screening ELISA tests-

A

Increased sensitivity and positive predictive value

B

Increased sensitivity and negative predictive value

C

Increased specificity and positive predictive value

D

Increased specificity and negative predictive value

High-Yield Explanation

Ref: Parks 23rd edition pg 139 Double ELISA meaning screening test is done in series. Series screening test : Sensitivity decreases Specificity increases PPV increases NPV decreases

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