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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.