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A population of 10,000 healthcare workers were tested with the FFP. What is the positive predictive value for a hospital with a flu prevalence of

A population of 10,000 healthcare workers were tested with the FFP. What is the positive predictive value for a hospital with a flu prevalence of 20%? Sensitivity is 89% and specificity is 86%. Please explain answers by showing step by step process used to determine answer.

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