<unk>  <unk>  is an infection of the lungs which occurs outside the hospital settings. It is the most common form of pneumonia and a major cause of morbidity and mortality. It often causes symptoms such as: breathing difficulties, fever, chest pains, and cough.<unk>  occurs when the alveoli becomes filled with fluid and cannot work effectively.Causes of<unk>  include: bacteria, viruses, fungi, and parasites.<unk>  can be diagnosed by its symptoms and physical examination alone, although x-rays, examinations of the sputum, and other tests are also often used.<unk>  is primarily treated with antibiotic medication. Some forms of<unk>  can be prevented by vaccination.
Community-acquired pneumonia
Community acquired pneumonia
Hospital-acquired pneumonia
Bacterial pneumonia
Fungal pneumonia
Severe acute respiratory syndrome
Aspiration pneumonia
Viral pneumonia