Upper respiratory infection (URI) affects the upper part of your respiratory system, including the throat, nose, sinuses, bronchi, and larynx.
Types of URIs
Upper respiratory infections affect your throat and sinuses. Some of the most common URIs are:
- Common cold
- Sinus infection — inflammation of sinuses
- Sore throat
- Epiglottitis — inflammation of the epiglottis
- Laryngitis — Inflammation of the larynx
- Bronchitis — inflammation of bronchial tubes
- Note: influenza isn’t a URI.
What Causes Upper Respiratory Infections?
URIs are transmitted when a virus or bacteria enters your respiratory system. This can happen if you touch an infected surface or have hand-to-hand contact with a sick person.