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Pneumonia (bronchopneumonia, lobar pneumonia and double pneumonia) is inflammation (swelling) of the tissue in one or both of your lungs. It is usually caused by an pneumococcal infection caused by bacteria called Streptococcus pneumoniae. However, there are many different types of bacteria and viruses that can lead to pneumonia.
At the end of the breathing tubes in your lungs are clusters of tiny air sacs which become inflamed and fill up with fluid.
Common symptoms of pneumonia include:
Mild pneumonia can usually be treated at home with antibiotics, rest and fluids.
Severe pneumonia may need to be treated in hospital as it can lead to complications, some of which can be fatal, depending on the health and age of the patient. These include: