2. Pneumonia

Pneumonia is another common lung infection. It occurs when the air sacs inside the lungs become inflamed. Unlike bronchitis, a bacterial infection is the most likely cause. People with pneumonia usually have a severe cough that produces mucus. More advanced cases may present with blood-stained mucus. People with pneumonia tend to develop high-grade fevers, chills, and sweating. They may lose their appetite. A fast heart rate is also common, along with pain in the chest that is aggravated by breathing or coughing.

what are Lung infections

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