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Pneumonia Symptoms and Causes

Pneumonia is an inflammation of the lungs caused by bacteria, viruses or chemical irritants. It is a serious infection or inflammation in which the air sacs fill with pus and other liquid. The main types of pneumonia are:

  • Bacterial pneumonia
  • Viral pneumonia
  • Bronchial pneumonia
  • Mycoplasma pneumonia
  • Lobar pneumonia