Covid Pcr Reference Range Not Detected. The agent detected may not be the definite cause of disease. It is just a question of semantics, but it means the same as negative, and is a more precise way of giving the result, in medical parlance.

Of viral dna was identified but it was not enough to test positive. It is just a question of semantics, but it means the same as negative, and is a more precise way of giving the result, in medical parlance. Not detected means the normal (standard) result is not to have covid detected in the sample.