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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
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.