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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.
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The horizontal fraction bar was introduced by the Arabs.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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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Illicit drug use costs the United States approximately $181 billion every year.