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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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The longest a person has survived after a heart transplant is 24 years.