Mercury is one of the most deadly poisons. Autism is probably caused by too many vaccinations at too early an age. Also these vaccinations do contain mercury to extend the shelf life IIRC.
So you can believe what you want but you only get one life.
Also you have to remember the FDA is in bed with the pharmaceutical companies. People leaving the FDA should not be allowed to take a job with a drug company for at least 10 years so maybe that would stop some of the foolishness.