Pneumonia is an infection of the lungs. It affects the small airways and air sacs in the lungs.
Development of Pneumonia in the Air Sacs of the Lungs
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Pneumonias are sometimes described by where and how you were infected, for example:
- Community-acquired pneumonia—acquired in the community (at school, work, gym)
- Nosocomial pneumonia—acquired in a hospital
- Aspiration pneumonia —happens when a foreign matter is inhaled (commonly happens while throwing up stomach contents)
Last reviewedSeptember 2012by Brian Randall, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.