Thimerosal generic Thimerosal is used as a preservative in certain vaccines; it may also still be used in some immune globulin preparations, anti-venins, skin test antigens, and ophthalmic and nasal products. It has documented antimicrobial properties and helps prevent potentially life threatening contamination with harmful microbes like bacteria and fungi. It is used in a safe dose in multi-dose vials of vaccines. Its use in vaccines in the United States and European countries has reduced since 2001.
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