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Pneumonia is inflammation (swelling) of the tissue in one or both of your lungs.
Our Health A-Z contains more information on Chest infection.
If you are worried about this condition you can try our free AI Symptom Checker here.
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.