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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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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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Everyone has one nostril that is larger than the other.