Amplification negative means that the sample being tested is still negative after a certain magnification, whereas negative means that the result is negative when tested normally. Amplification refers to a medical term that means magnification. Amplification negative refers to the manner in which a virology laboratory test is performed and generally refers to the expression of the results of a viral nucleic acid test. Amplification generally means amplifying the nucleic acids of a sample by means of PCR, etc. For example, in the case of a small number of viruses, a normal test may be negative, and a re-test after amplification may be positive. If the normal test is negative and the sample is still negative after amplification, then basically it can be determined that there is no infection of this virus in the body. Of course, if there is a suspicion of a certain viral infection, it may be necessary to conduct not only an amplification test, etc., but also a test for antibodies, etc., which is decided by the doctor according to the patient’s condition.