The nucleic acids of different viruses are different. For example, the new coronavirus nucleic acid is an RNA virus, and the AIDS virus is also an RNA virus, but the sequence of each virus is different, and the reagents used for testing and the products of expansion are not the same. Hepatitis B can also be tested for hepatitis B virus nucleic acid, hepatitis B is a DNA virus, only with specific reagents to detect the corresponding virus or antibodies, etc.. If you test for the new coronavirus nucleic acid, you certainly can’t find hepatitis B by drawing blood. AIDS is also not detected hepatitis B, but if the nucleic acid test for hepatitis B virus, if it is positive, it certainly indicates that it is hepatitis B virus infection.