Thiomersal
Thiomersal (INN), or thimerosal, also sold under the name merthiolate is an organomercury compound. It is a well-established antiseptic and antifungal agent. The pharmaceutical corporation Eli Lilly and Company named it Merthiolate. It has been used as a preservative in vaccines, immunoglobulin preparations, skin test antigens, antivenins, ophthalmic and nasal products, and tattoo inks. In spite of the scientific consensus that fears about its safety are unsubstantiated, its use as a vaccine preservative has been called into question by anti-vaccination groups. A 1999 statement issued in CDC's Morbidity and Mortality Weekly Report announced that "the Public Health Service (PHS), the American Academy of Pediatrics (AAP), and vaccine manufacturers agree that thimerosal-containing vaccines should be removed as soon as possible" and that these groups would collaborate to replace them while manufacturers committed "to eliminate or reduce as expeditiously as possible the mercury content of their vaccines." It remains in use as a preservative for certain annual flu vaccines, mostly those stored in multi-dose vials.
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