The new antibody test from Roche has a specificity rate exceeding 99.8 percent and sensitivity of 100 percent, but what does that mean?

Here you will find a brief video from Micheel Cima which does a very good job of explaining specificity and sensitivity and how those values impact our ability to monitor the pandemic. Of particular interest is how the actual prevalence of the virus impacts the usefulness of a given test. The numbers reported by Roche for their test are a big step forward in Covid 19 survelliance.