Novel coronavirus pneumonia asymptomatic infection refers to patients with no clinical manifestations when they test positive for nucleic acid and no manifestations of new coronavirus pneumonia on chest imaging, including two cases: one is in the incubation period and has not yet developed; the other is in the early stage of infection with occult infection. Occult infection is a pathogen that, after invading the body, only causes the body to produce an immune response and does not cause or causes only minor tissue damage, with no clinical manifestations. Patients with novel coronavirus pneumonia were observed in isolation for 14 days without any self-perceivable signs and symptoms, and without any clinically recognizable signs and symptoms. Asymptomatic infections with novel coronavirus pneumonia remain infectious.