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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.