"Upper Respiratory Tract Infection: eMedicine Pulmonology" [emedicine.medscape.com] URTI upper respiratory infections. Upper Respiratory Tract Infection [emedicine.medscape.com] http://emedicine.medscape.com/article/302460-overview [emedicine.medscape.com] [emedicine.medscape.com] Upper Respiratory Tract Infection [emedicine.medscape.com] [emedicine.medscape.com] [emedicine.medscape.com] [emedicine.medscape.com] http://emedicine.medscape.com/article/302460-overview [emedicine.medscape.com] [emedicine.medscape.com] Medscape - Upper Respiratory Tract Infection [emedicine.medscape.com] upper respiratory tract infections http://emedicine.medscape.com/article/302460-overview [emedicine.medscape.com] [emedicine.medscape.com] [emedicine.medscape.com] URI [emedicine.medscape.com] http://emedicine.medscape.com/article/302460-overview [emedicine.medscape.com] [emedicine.medscape.com] Upper respiratory infection