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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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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There are more bacteria in your mouth than there are people in the world.
In 2009, historian Woody Holton described how Abigail Adams shrewdly invested in the Continental Con