what type of mercury is in thimerosal
Mercury in Vaccines Leaves Blood Fast. Jan 30, 2008 -- Ethyl mercury from the vaccine preservative thimerosal leaves the blood 10 times faster than methyl mercury, on which current risk assessments are based. Only trace levels of thimerosal can be found in U.S. vaccines, except in multi-dose vials of flu vaccine (single-dose flu vaccine has no thimerosal).