Adenoviruses are a common group of viruses that infect the mucous membranes of the eyes, airways and lungs, intestines, urinary tract, and nervous system. They are common causes of fever, cough, sore throat, diarrhea, and pink eye. Infections usually cause only mild symptoms that clear up after a few days. But they can be more serious in people with weakened immune systems, especially children. There is currently no specific treatment for adenovirus infection. However, people with suspected illness should see a doctor for timely medical assistance.