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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Excessive alcohol use costs the country approximately $235 billion every year.
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There are more nerve cells in one human brain than there are stars in the Milky Way.