Upper Respiratory Infection typically involves nose, sinuses, pharynx, or larynx. Which structure is not typically involved?

• A. Lungs
• B. Nose
• C. Pharynx
• D. Larynx

Answer: (A)

Upper respiratory infections involve structures above the vocal cords—the nose, sinuses, pharynx, and larynx. The lungs are part of the lower airway, so they are not typically involved in an upper respiratory infection. If the lungs are affected, that’s considered a lower respiratory tract infection (such as bronchitis or pneumonia), which presents with features like chest symptoms, dyspnea, or abnormal lung sounds. Therefore, the structure not typically involved is the lungs.