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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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.

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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.

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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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