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Vaccines prevent between 2.5 and 4 million deaths every 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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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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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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Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.