I think a lot of this disagreement could be cleared up if there were studies done on the long term effects of low doses of mercury.<p>Mercury is bioaccumalitive and so I think such studies are justified. Why is no one doing this?<p>Also from a business perspective if there is such concern about methylmercury in vaccines why doesn't someone bring to market vaccines that use a different (more natural?) preservative? It seems like this would be a win win all around.<p>Also I would avoid using wikipedia as a direct source.