http://www.reuters.com/article/latestCrisis/idUSN30505454

The study done at UofR (I guess I picked the wrong school) showed that the half life of ethyl mercury (the kind used in Therimisol a vaccine preservitive no longer used in the US) is about one tenth that of methyl mercury, which can build up and become toxic. The ethyl mercury doesn't have time to.

Regardless ABC plans to air an anti-vaccine propaganda legal drama.