Peter Attia· MD
what a specificity specificity is effectively the reciprocal concept of that it's the true negative rate so it's the probability that somebody who is negative tests negative
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The headline is broadly defensible, but the qualifications matter. Effect sizes vary by population, the strongest claims rest on shorter trials, and credible voices push back on how it's typically framed.
what a specificity specificity is effectively the reciprocal concept of that it's the true negative rate so it's the probability that somebody who is negative tests negative
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what is sensitivity right we throw these words around it's important more so what they mean sensitivity is the probability that the test will be positive if the person in fact has the virus so it's the true positive rate
conversely if you went over to specificity I made that 80% you would get the reverse in this case we're targeting starting starting with a base of 99 thousand people who are not infected and so 20% of those would falsely test positive and 80% of those would truly test negative