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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.
Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.
On average, the stomach produces 2 L of hydrochloric acid per day.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.