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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Medications that are definitely not safe to take when breastfeeding include radioactive drugs, antimetabolites, some cancer (chemotherapy) agents, bromocriptine, ergotamine, methotrexate, and cyclosporine.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Excessive alcohol use costs the country approximately $235 billion every year.
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In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.