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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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On average, the stomach produces 2 L of hydrochloric acid per day.

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

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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.

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