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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The average office desk has 400 times more bacteria on it than a toilet.
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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.