Adenovirus infections can commonly cause cold or flu-like symptoms, fever, and sore throat. They can also cause conditions such as pink eye or conjunctivitis; inflammation of the airways in the lungs, called acute bronchitis; pneumonia, a lung infection; and inflammation of the stomach or intestines, known as acute gastroenteritis. The most significant symptoms of adenovirus infections include:

Sore throat
Severe cough
Difficulty breathing
Runny nose
Eye irritation
Fever
Diarrhea
Vomiting
Abdominal tenderness and swelling

These symptoms may be more severe in children and individuals with weakened immune systems. Early diagnosis and hygiene practices are important to prevent complications from the infection. It is necessary to seek medical attention if symptoms worsen or persist.