An influenza virus or streptococcal antigen test for the common cold may be positive but does not affect the new Crown pneumonia antigen test. Antigens are mainly substances that can stimulate the body to cause an anti-immune response and generate corresponding antibodies, such as bacteria, viruses and other pathogens. And the common cold may be caused by infection by pathogens such as bacteria and viruses. So whether it is bacterial cold or viral cold, it may stimulate the body to produce an immune response, so that the body after the cold to produce antibodies, enhance the resistance to bacteria and viruses, so the common cold to do antigen test may show positive. However, the New Crown Pneumonia antigen test targets the New Crown Pneumonia virus, and its results are generally unaffected by the pathogens of the common cold. Patients with colds can go to the hospital, and under the guidance of the doctor to apply the compound aminophenolamine tablets, aminoglutethimide capsules and other anti-cold medications for treatment. Those who have symptoms of colds, but have a history of close contact with people infected with C.pneumoniae, or history of living in dangerous areas, need to complete the anti-coronavirus antigen test or anti-coronavirus nucleic acid test in a timely manner. Tips] The “new coronavirus pneumonia, new coronavirus pneumonia” mentioned in this article has been renamed to “new coronavirus infection” on December 26, 2022, as announced by the National Health Commission.