Adenovirus infections typically present with cold or flu-like symptoms, fever, and sore throat. These infections can also lead to more serious conditions such as conjunctivitis (pink eye), acute bronchitis (inflammation of the airways in the lungs), pneumonia (lung infection), and acute gastroenteritis (inflammation of the stomach or intestines).

The main symptoms of adenovirus infections include:
* Sore throat
* Severe cough
* Difficulty breathing
* Runny nose
* Eye irritation
* Fever
* Diarrhea
* Vomiting
* Abdominal tenderness and bloating

These symptoms can be more severe, especially in children and individuals with weakened immune systems. Early diagnosis and hygiene measures are crucial to prevent potential complications of the infection. Medical attention is recommended if symptoms worsen or persist.