Pneumonia is a serious disease which affects your lungs and makes it difficult for you to breath inflammation or infection of the alveoli of the lungs of varying degrees of severity and caused by bacteria, viruses, etc.
A pulmonary infarction is the death of a portion of lung tissue caused by an interruption of its blood supply, most commonly due to blockage in the blood vessels supplying the lung tissue.
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The immune system defends the body against infections and certain other diseases. It is made up of different organs, cells, and proteins known as antibodies. It identifies, attacks, and destroys germs and other foreign substances. A cell called a B lymphocyte develops into a plasma cell, which produces antibodies to fight off such invaders.
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- The obstruction of a blood vessel by a foreign substance or a blood clot that travels through the bloodstream, lodging in a blood vessel, plugging the vessel. Blood clots are the most common causes of embolisms.
- A pulmonary embolus is a blood clot that has been carried through the blood into the pulmonary artery (the main blood vessel from the heart to the lung) or one of its branches, plugging that vessel within the lung.
- The clots block blood flow to the lungs, pulmonary embolism can be life-threatening.
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- Anemia is a medical condition in which the red blood cell count or hemoglobin is less than normal. Anemia is caused by either a decrease in production of red blood cells or hemoglobin, or an increase in loss (usually due to bleeding) or destruction of red blood cells.
- For men, anemia is typically defined as hemoglobin level of less than 13.5 gram/100 ml and in women as hemoglobin of less than 12.0 gram/100 ml.
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