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Did you know?
Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The average adult has about 21 square feet of skin.