CDC Vaccine Advisors To Vote On Thimerosal In Flu Shots. Here’s What To Know About Thimerosal

The CDC’s Advisory Committee on Immunization Practices is scheduled to make a decision later this week regarding the use of thimerosal in flu vaccines. Thimerosal is a mercury-based organic preservative that was historically used in vaccines to prevent the growth of harmful bacteria and fungi, particularly in multi-dose vials. However, concerns have been raised about the potential harm of thimerosal in vaccines.

Before the late 1990s, infants were recommended to receive three vaccines containing thimerosal. These vaccines included hepatitis B, Haemophilus influenzae type b, and diphtheria-tetanus-acellular pertussis. Despite this, the FDA states that there are no known health risks associated with thimerosal at the concentrations used in vaccines.

Secretary of Health and Human Services Robert F. Kennedy Jr. has argued that thimerosal is toxic to brain tissue, citing scientific research. However, thimerosal is metabolized as ethylmercury in the body, which is different from the more harmful methylmercury. Ethylmercury is removed from the body quickly and poses a lower risk compared to methylmercury.

In 1999, thimerosal was removed from most childhood vaccines as a precautionary measure due to scientific uncertainty and theoretical concerns. The only childhood vaccine that still contains thimerosal in some formulations is the flu vaccine. Despite concerns raised by some, studies have not shown a link between thimerosal in vaccines and adverse health effects.

The use of thimerosal in vaccines has declined over the years, with many vaccines now available in single-dose containers. The ACIP will vote on the status of thimerosal in vaccines, but experts warn that removing thimerosal from vaccines may not necessarily make them safer. Thimerosal has been extensively studied and shown to be safe and effective as a preservative.

Dr. Jeremy Faust, Editor-in-Chief of MedPage Today, cautions that casting doubt on vaccine safety could undermine public confidence in vaccinations. Elevating misinformation about thimerosal could lead to further actions that harm vaccine confidence in the United States. It is essential for decision-makers to consider the scientific evidence and prioritize public health in their deliberations.