Adenovirus can cause a variety of diseases, the most common are acute respiratory infections in infants and young children, adenoviral pneumonia, epidemic keratoconjunctivitis, pharyngeal conjunctivitis, and other diseases such as infantile diarrhea, hemorrhagic cystitis, myocarditis, meningitis, etc. Adenovirus can infect the respiratory tract, gastrointestinal tract, urethra and bladder, eyes, liver, etc., about 1/3 of the known serotypes of human adenovirus are usually associated with human diseases, but one serotype can cause different clinical diseases; Conversely, different serotypes can cause the same disorder.