Yet another study has shown no link between the former vaccine additive thimerosal and neurological problems in children. This one evaluated over a thousand seven-to-ten year olds for a long list of outcomes, and came up negative. No strong correlations were found, and the weak ones seemed to spread out evenly among positive and negative consequences.
This is just the kind of data that researchers are used to seeing. Most experiments don't work, and most attempts to find correlations come up empty. The leftovers are a pile of weak, unconvincing traces, all pointing in different directions while not reaching statistical significance. For a study like this one, though, this is a good answer. The question is "Does thimerosal exposure show any connection to any of these forty-two neurological symptoms?", and the answer is "No. Not as far as we can see, and we looked very hard indeed."
And this isn't the first study to find the same sorts of results. The fact that reports of autism do not appear to decrease after thimerosal is removed from circulation should be enough on the face of it, but there's the problem. To the committed believers, those data are flawed. And these latest data are flawed. All the data that do not confirm that thimerosal is a cause of autism are flawed. Now, if this latest study had shown the ghost of statistical significance, well, that would no doubt be different. But it didn't, and that means that there's something wrong with it.
The director of SafeMinds, a group of true thimerosal believers if ever there was, actually was on the consulting board of this latest study. But she withdrew her name from the final document. The CDC is conducting a large thimerosal-and-autism study whose results should come out next year. Here's a prediction for you: if that one fails to show a connection, and I have every expectation that it'll fail to show one, SafeMinds will not accept the results. Anyone care to bet against that?
As a scientist, I've had to take a lot of good, compelling ideas of mine and toss them into the trash when the data failed to support them. Not everything works, and not everything that looks as if it makes sense really does. It's getting to the point with the autism/thimerosal hypothesis- has, in fact, gotten to the point quite some time ago - that the data have failed to support it. If you disagree, and I know from my e-mail that some readers will, then ask yourself what data would suffice to make you abandon your belief? If you can't think of any, you have moved beyond medicine and beyond science, and I'll not follow you.