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A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.