doomsday,
Regarding Thimerosal, This has been discussed earlier, yet might have been to scientific for you to comprehend so here is the simple version.
Thimerosal was used as a preservative in multi-dose vials, there are multiple well-published studies that clearly state that thimerosal safe, thimerosal is also used in cosmetics and skin products.
Yet after the FDA began pushing for reducing any mercury due to potential safety concerns, thimerosal was removed from vaccines and the MMR shots are no longer multi-dose vials. Despite the studies indicating that thimerosal was safe, the CDC decided that it will accommodate the notion of reducing mercury and remove it from the MMR vaccine.
Also, has there been any change in any of the supposed disorders you suppose were caused by thimerosal since its removal? the answer is no, so why still hold on to this?
With regards to Vioxx, the FDA had a concern to its safety with regards to it elevating patients blood pressure, the controversy was about Vioxx withholding the risks in its marketing and patients not being advised of the risks, either case this discussion is not about Vioxx, it is about vaccines and autism.
the MMR shot has been around longer than 5 years, has been administered millions of times, extensively tested and is considered safe.