Sensitivity and specificity tutorial

EPI 101 thread on sensitivity and specificity, plus its application to #COVID19 screening. For those who want a refresher!

The way we summarize the accuracy of a test (such as RT-PCR on a #coronavirus throat swab) is with two quantities: sensitivity and specificity. 1/12

— Natalie E. Dean, PhD (@nataliexdean) March 13, 2020