What is the Full form of URI?

URI stands for “Upper Respiratory Infection”

Upper respiratory infections (URIs) are one of the most common reasons for doctor visits. Upper respiratory infections are the most common illness resulting in missed work or school. Upper respiratory tract infections can happen at any time but are most common in the fall and winter.

The vast majority of upper respiratory infections are caused by viruses and are self-limited.

Symptoms of URI

• cough
• sneezing
• nasal discharge
• nasal congestion
• runny nose
• fever
• scratchy or sore throat
• nasal breathing.

Causes of URI

The URTI is generally caused by the direct invasion of the inner lining (mucosa or mucus membrane) of the upper airway by the culprit virus or bacteria.

In order for the pathogens (viruses and bacteria) to invade the mucus membrane of the upper airways, they have to fight through several physical and immunologic barriers.