disease has location viral infectious disease viral respiratory tract infection MONDO:0024352 NCIT:C27219 SCTID:312133006 MEDGEN:163755 A respiratory tract infection caused by a virus. Viruses represent the most common causes of upper and lower respiratory tract infections and include rhinoviruses, influenza viruses, parainfluenza viruses, and respiratory syncytial virus. viral respiratory tract infection ICD9:519.8 UMLS:C0877203 respiratory tract infectious disorder respiratory tract