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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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.
Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.