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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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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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Most fungi that pathogenically affect humans live in soil. If a person is not healthy, has an open wound, or is immunocompromised, a fungal infection can be very aggressive.

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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.

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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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