American pharmaceutical company founded in Philadelphia in 1860 as John Wyeth and Brother, run for most of the twentieth century as Wyeth Laboratories within American Home Products, which took the Wyeth name for the whole group in 2002 and was bought by Pfizer in 2009. Made and sold prescription medicines, vaccines including the pneumococcal conjugate vaccine, biologics such as etanercept, nutritional products and consumer health lines, and ran its own research laboratories, manufacturing and clinical development before the takeover.
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