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Giardia is one of the most common intestinal parasites worldwide, and infects up to 20% of the world population, mostly in poorer countries with inadequate sanitation. Infections are most common in children, though chronic Giardia is more common in adults.
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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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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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The average office desk has 400 times more bacteria on it than a toilet.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.