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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.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
Cyanide works by making the human body unable to use oxygen.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.