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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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Medication errors are three times higher among children and infants than with adults.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.