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Croup is a childhood condition that affects the windpipe (trachea), the airways to the lungs (the bronchi) and the voice box (larynx).
Our Health A-Z contains more information on Croup.
Diphtheria is a contagious bacterial infection that mainly affects the nose and throat.
Our Health A-Z contains more information on Diphtheria.
Important: If you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.