Adenoviral infections usually present as upper respiratory tract infections, which can be categorized as common cold and pharyngeal conjunctival fever, and usually resolve in 4-7 days. In case of viral pneumonia, it takes 2-4 weeks to recover. 1. Common cold: Nasopharyngeal infection is the main clinical manifestation. The onset of the disease is relatively acute, with sneezing, nasal congestion and watery nasal discharge at the same time or a few hours after the onset of the disease. Generally, there is no fever and systemic symptoms, or only low-grade fever, malaise, mild chills and headache. Physical examination reveals nasal mucosa congestion, edema, secretion and mild pharyngeal congestion. Generally, it can be cured in 5-7 days. 2. Pharyngeal conjunctival fever: pharyngeal conjunctival fever is a kind of viral conjunctivitis manifested as acute follicular conjunctivitis, accompanied by upper respiratory tract infection and fever, which is adenovirus 3 and 7 infection. Often occurs in summer, children are common, swimmers are easy to spread. Clinical manifestations are mainly fever, pharyngitis, conjunctivitis three major symptoms. The course of the disease is 4-6 days. 3. Adenoviral pneumonia: patients often have fever, cough, shortness of breath, muscle pain and other manifestations, the duration of the disease 2-4 weeks. After adenovirus infection, if symptoms such as cough and sputum appear, it is recommended to actively seek medical treatment.