Adenovirus infection is a viral illness caused by adenoviruses, affecting different organ systems such as the respiratory, digestive, eye, and urinary tracts. It can occur in children and adults, particularly those with weakened immune systems. Adenovirus infections can spread rapidly through various routes of transmission and can lead to serious health problems if they progress.

There are 88 known types of adenoviruses that infect humans. These viruses circulate throughout the year and don't show strong seasonality like influenza viruses. Adenovirus is typically a virus that infects the respiratory tract and the intestinal system. Adenovirus infection usually presents with cold-like symptoms. The most common symptoms of adenovirus infection include sore throat, runny nose and eyes, sneezing, headache, cough, and fever. In some individuals, adenovirus infection can cause croup or bronchitis, while other infections can also lead to problems such as conjunctivitis (pinkeye), rash, diarrhea, and bladder infections.