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Blood is approximately twice as thick as water because of the cells and other components found in it.
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.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

