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Thimerosal is a preservative containing mercury that was used in vaccines since the 30s. It has been absent from childhood vaccines for many years. The CDC is pretty clear on this:
http://www.cdc.gov/vaccinesafety/concerns/thimerosal.htm
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Thimerosal/Mercury
Thimerosal is a preservative containing mercury that was used in vaccines since the 30s. It has been absent from childhood vaccines for many years. The CDC is pretty clear on this:
http://www.cdc.gov/vaccinesafety/concerns/thimerosal.htm