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Typical signs of pneumonia

Most people withbacterial pneumonia get sick very quickly and see a doctor within a few days. Doctors often refer to typical and atypical condition, based on the signs of pneumonia. Pneumonia is a lung infection that can be caused by different types of microorganisms, including bacteria, viruses, and fungi. In about 30 percent of people with pneumococcal pneumonia, the bacteria invade the bloodstream from the lungs.
Pneumonia in children may additionally be classified based on signs and symptoms as non-severe, severe, or very severe. To prevent and minimize injury and invasion by microorganisms and foreign substances, various defense mechanisms have evolved, both systemically and within the respiratory tract. Some observational studies have found that the flu shot can reduce hospitalizations in the elderly by 30 to 50%.