The test result is positive or negative, and the significance of the test result is different for different test items. 1. Situations that do not represent the condition: a negative or positive early pregnancy test does not mean that the virus is infected, and if it is positive, it is generally considered to be pregnant; the significance of negative and positive results of different tests is different, for example, a positive or negative fecal occult blood test only suggests that there is bleeding in the gastrointestinal tract. 2. Test results related to viral infection: Positive antibodies may also be the result of previous infection or vaccination, such as hepatitis B surface antibody. Positive antigen is usually indicative of infection by a certain virus; for example, positive hepatitis B surface antigen indicates infection by the hepatitis B virus, and positive nucleic acid test for the new coronavirus usually indicates infection by the new coronavirus. If the results are abnormal, further tests are needed to understand the condition, and it is important to actively seek medical attention to find out the cause and follow standardized treatment.