Asymptomatic infection refers to patients who are infected with pathogens that have no symptoms such as cough, sore throat, etc., but are contagious. Patients with asymptomatic infections are called asymptomatic infected patients, these patients do not have clinical symptoms of infection, such as fever, cough, sore throat, etc., indicating that the pathogen has less impact on the body, but if the pathogenicity of the test can have a positive result. People with asymptomatic infections need to be physically fit and improve their immunity to prevent pathogens from damaging their bodies. It is important to note that asymptomatically infected patients are also infected and a source of infection, and therefore should be adequately quarantined to prevent passing the pathogen on to others and causing them to become ill.