Upper respiratory infection:Aninfectionof the upper part of therespiratory systemwhich is above thelungs. An upper respiratory infection can be due to any number ofviralorbacterial infections. These infections mayaffectthethroat(pharyngitis),nasopharynx(nasopharyngitis), sinuses (sinusitis),larynx(laryngitis),气管(tracheitis) orbronchi(bronchitis).
Upperrespiratoryinfection is commonly abbreviatedURI.
