Thimerosal contains ethylmercury, which is cleared from the human body more quickly than methylmercury, and is therefore less likely to cause any harm. Thimerosal prevents the growth of bacteria in vaccines. Thimerosal is added to vials of vaccine that contain more than one dose (multi-dose vials) to prevent growth of germs, like bacteria and. Does the Td vaccine have thimerosal? There is no thimerosal in Tenivac® Td vaccines, but generic Td vaccines (MassBiologics) do contain trace amounts of thimerosal. Thimerosal is a mercury-based preservative that has been used in some vaccines since the 1920s. What else is in the Td vaccine?
Thimerosal is an antiseptic and antifungal agent containing mercury, a common ingredient in adult vaccines, notes "Mosby’s." In the U.S. and Europe, thimerosal is no longer used as a preservative in childhood vaccines because of the concerns of mercury poisoning, although it continues to be a component of tetanus shots. Do I need a booster shot? Yes. Adults need booster shots against tetanus and diphtheria every 10 years, either with Tenivac or a generic Td vaccine. Is Tenivac a live vaccine? No. Tenivac contains modified bacterial toxins called toxoids that can’t cause tetanus or diphtheria. They trigger the immune system to respond and develop anti-toxins.
* This product should be considered equivalent to thimerosal‐free products. This vaccine may contain trace amounts (thimerosal removal; these amounts have no biological effect. With Tdap, there are many precautions and warnings to be aware of before receiving the vaccine. Make sure to tell your healthcare provider if you have (or previously had) epilepsy, a stroke, or other nervous system disorders, as Tdap may not be suitable for you.