Antigen test is still more accurate, but its sensitivity and precision are not as good as that of nucleic acid test.
Comparatively speaking, antigen test is worse than nucleic acid test. In the early stage of viral infection, although the viral load is relatively low, however, nucleic acid test can be detected, as nucleic acid test has the process of amplification, whereas antigen test does not, so there may be a situation in which the antigen cannot be detected, whereas nucleic acid test can be detected.
Therefore, patients need to undergo further nucleic acid testing if the antigen test is weakly positive, and if the result is positive, it can be used as the basis for confirming the diagnosis.
In addition, nucleic acid test also has certain matters that need attention, so before receiving the test, it is recommended to consult with a specialist, do not be negligent, so as not to cause delays in the condition.