Upper Respiratory Infections (URI)

Upper respiratory infections (URIs) are common viral illnesses that affect the nose and throat. They are usually caused by viruses but can also be caused by bacteria. URIs can cause symptoms like cough, excess mucus, and sore throat. Most people recover within a few weeks, but some may develop complications that require medical treatment. This page provides information on the causes, symptoms, risk factors, and treatment options for upper respiratory infections.