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There are approximately 3 million unintended pregnancies in the United States each year.

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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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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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