An upper-respiratory infection (URI) is an infection that affects the upper air passages including the larynx, the nasal cavity, the nasal passages, and the pharynx.
The sources of URIs are almost always viral. Droplets of infected saliva and mucus spray out into the air when a person sneezes or coughs. Other people may breathe them in, or they can land on surfaces that others touch. Symptoms can include:
- Coughing
- Discomfort in the nasal passages
- Mild fever
- Excess mucus
- Nasal congestion
- Pain or pressure behind the face
- A runny nose
- A sore throat
- Sneezing