Adenovirus are large, non-enveloped viruses with linear, double-stranded DNA that are transmitted through respiratory droplets from coughing or sneezing or touching contaminated surfaces. Symptoms vary depending on infection site but include sore throat, sneezing, cough and pneumonia for respiratory infections and diarrhea for intestinal infections. Diagnosis is based on symptoms and can include molecular and blood tests. Treatment focuses on rest, fluids, fever medication and in severe cases additional treatment may be needed. Prevention involves handwashing, covering coughs and sneezes, and avoiding contact with infected individuals.