Tag Archives: thimerosal

Thimerosal as a Preservative in Vaccines

AU National Review

Preservatives are used in vaccines to prevent or kill any growth of bacteria, fungi, or other microorganisms that might have contaminated the vaccine vial. Microorganisms are able to get into the vials that are punctured more than once with a needle. Multiple punctures only occur in vaccine vials that are labeled as multi-dose vials and are intended to be used with different needles more than one time.

Due to tragic events in vaccine history, such as the infection of children with deadly bacteria after injection with multi-dose vaccines, the United States Code of Federal Regulations (the CFR) required preservatives be added to multi-dose vials of vaccines. Because of many incidences of infections due to vaccinations, preservatives have been required in multi-dose vaccines since the 1930’s.

Since then, thimerosal has been the most widely used preservative in multi-dose vaccines. It has a long record of safety and has been proven effective at preventing bacterial and fungal contamination of vaccines. However, over the past several years, thimerosal has become a target for controversy due to its mercury concentration and concern for safety.

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Measles, Mumps, and Rubella Vaccine (MMR)

Screen Shot 2014-02-07 at 9.48.28 PMThe measles, mumps, and rubella (MMR) vaccine is safe. The end. Phew, that was easy!

Of course I’m only kidding. That’s definitely not the end, not even close. There’s so much information out there about the MMR vaccine—good and bad, informative, and plenty of opinions—that it’s hard to know what to believe. I’m not going to give you my opinion on the vaccine (although I’m sure you could guess), that’s for another post. These are the facts.

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