The adenovirus is among a group of viruses that typically infect membranes of the urinary tract, intestines, the respiratory tract and the eyes, according to KidsHealth. The viruses can cause sore throat, bronchitis, pneumonia, diarrhea, cold-like symptoms and pink eye, states the Centers for Disease Control and Prevention.
Adenoviruses are infectious and usually spread from infected people to others by shaking hands or by placing the hands on the mouth, nose or eyes after touching infected surfaces, explains the CDC. The virus also can spread through the air when infected people cough and sneeze. The adenovirus infection can occur at any age, although it can develop into severe illness in infants and people with weakened immune systems.