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Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Cyanide works by making the human body unable to use oxygen.

Deformation in human bones caused by (a) rickets and (b) osteoporosis. Deformation in human bones caused by (a) rickets and (b) osteoporosis.
Skin signs are objective evidence of an illness or disorder. They can be seen, measured, or felt. Skin signs are objective evidence of an illness or disorder. They can be seen, measured, or felt.
Bipolar disorder. Bipolar disorder.
Common skin signs are often evidence of an illness or disorder. A macule is a discolored spot on the ... Common skin signs are often evidence of an illness or disorder. A macule is a discolored spot on the ...
Common skin signs are often evidence of an illness or disorder. A nodule is a larger papule; acne ... Common skin signs are often evidence of an illness or disorder. A nodule is a larger papule; acne ...
Calcium metabolism in osteoporosis. Calcium metabolism in osteoporosis.
Video: Cardiac Cycle (Part 4 of 4)

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