A secondary asymptomatic infected person means that the patient is caused by another disease and appears to be carrying the virus without developing the disease. Secondary means that the patient’s current infection is mainly caused by other diseases, and asymptomatic infected person means that the patient infected with the bacteria or virus and other pathogens do not show obvious clinical symptoms. Such patients do not have obvious symptoms, so they do not realize that they are infected by pathogens, and they are often found during physical examinations, and some of them also have the ability to spread the disease, which is socially hazardous. Therefore, once secondary asymptomatic infections are detected in the clinic, unified management is needed to prevent the spread of the disease. Patients who are eligible for drug therapy are promptly treated with medication.