An upper respiratory tract infection (URTI) is an infection affecting one or more parts of the upper respiratory system, such as the nose, sinuses, throat, or related structures.
Most upper respiratory tract infections are caused by viruses, although some are caused by bacteria. Common examples include the common cold, some forms of sinusitis, and some cases of pharyngitis.
Symptoms can include a runny or blocked nose, sneezing, sore throat, cough, facial pressure, and fever. The appropriate treatment depends on the cause and severity of the infection.
QUICK FACT
Most upper respiratory tract infections are viral, which is why antibiotics are not routinely useful for them.
COMMONLY CONFUSED WITH
Lower respiratory tract infection: Lower respiratory tract infections involve structures such as the bronchi and lungs and include conditions such as bronchitis and pneumonia.
SEE ALSO