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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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The average adult has about 21 square feet of skin.