Asymptomatic infection is also called hidden infection or virus/bacteria carrier. Asymptomatic infections mainly refer to those who are infected by bacteria or viruses after contact with infected people, and the infectious agent is clearly identified by perfecting relevant examinations, but there are no obvious clinical symptoms, nor do they feel any physical discomfort, and they are often found during physical examinations. Since there is a possibility of spreading the disease or aggravation of the condition of the patient, anti-infection treatment should be carried out as soon as possible after the diagnosis is clear. Asymptomatic infections are very common in the diagnosis and treatment of infectious diseases and belong to a special type of patients, which are also the main source of infectious diseases, and once the diagnosis is confirmed, it is also necessary to take appropriate isolation measures. Therefore, once abnormal indicators are found in the examination, even if there is no corresponding clinical manifestation, it is necessary to consult the doctor immediately, complete the relevant examinations, and start treatment as soon as possible after the diagnosis is clear to prevent delays in the condition.