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Did you know?
Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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.