The test may also return a false negative. There is a case that a patient is identified after 4 tests. https://www.worldofbuzz.com/wuhan-patient-tests-negative

The test may also return a false negative. There is a case that a patient is identified after 4 tests. https://www.worldofbuzz.com/wuhan-patient-tests-negative-4-times-before-diagnosis-his-doctors-say-tests-may-return-false-negatives/ https://www.worldofbuzz.com/wuhan-patient-tests-negative-4-t...