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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).