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Extending the shelf life of vaccines *is* a valuable thing to do though. Vaccine supply and demand is a funny thing, and anything which allows producers to ride that wave smoother decreases the overall cost of vaccines and increases the overall supply.

There actually have been quite extensive studies on thimerasol at this point. Check the conclusions. Heck, simply by noting the decline in the use of thimerasol and the continued increases in rates of autism diagnoses you can see that any link is tenuous at best. There have been any number of dramatic changes in society in the last 20 years (not the least of which is improved awareness and diagnoses procedures for autism). Why conclude that a specific additive in vaccines of all things would be the cause? It's There is no logic or evidence to it. It's a literal example of the Pastafarian correlation/causation joke around "the decline in pirates causes global warming".