There is a math that you have to apply with the amount infected. Like a test that is %99 accurate for a disease that only happens %0.001 of the time will have

There is a math that you have to apply with the amount infected. Like a test that is %99 accurate for a disease that only happens %0.001 of the time will have high false negative or positive rate, which is somewhat unexpected result. More detail: https://www.lesswrong.com/posts/XTXWPQSEgoMkAupKt/an-intuitive-explanation-of-bayes-s-theorem https://www.lesswrong.com/posts/XTXWPQSEgoMkAupKt/an-intuiti...