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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.