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A screening test for SARS-CoV-2 (Covid-19) used to test the presence of positive antibody positive or negative antibody using the Antigen test (rapid test) showed

  1. A screening test for SARS-CoV-2 (Covid-19) used to test the presence of positive antibody positive or negative antibody using the Antigen test (rapid test) showed 95% sensitivity and 98% specificity? The prevalence rate of the disease is 20%.

  1. Interpret the two results (sensitivity and specificity).

  1. Calculate the PPV and interpret.

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