The Differences Between Methyl Mercury and Mercury in Autism Rates

Methyl mercury is what you'll find in tuna fish or the earth's crust. That molecule is more easily able to pass cell membranes and so it's more able to accumulate in your body relative to ethyl mercury, which is more easily excreted. The thimerosal that was used as a preservative back then and still is in some limited vaccines, but it's a preservative. So yeah, really, big pharma lost out in the end by taking thimerosal out of vaccines.