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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.
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Excessive alcohol use costs the country approximately $235 billion every year.
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There are approximately 3 million unintended pregnancies in the United States each year.
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According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.