The vaccine done it!
Run for your lives!
Well, maybe not quite that simple.

Googling "methylmercury toxicology"

http://www-apps.niehs.nih.gov/centers/Public/news/nws321.htm

Interesting article on methylmercury that include prevalence in the environment and hints at why some people may experience problems while others don't.

Is it possible that the few children that were damaged by its inclusion in a vaccine also ate seafoods such as tuna and had other odd metaboloc things going on as well? [Such as low vitamin E and Selenium levels?]

Interactions of vitamin E and selenium with mercury and silver http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6940477&dopt=Abstract

[They really should have been using silver for preservation, ey?
But, you can't do what you don't know about and you do do what you 'assume' you do know...till someone suddenly has to clean up the doo doo and figure out where all the poop came from when there wasn't any appreciable amount in the lab.]

See also:
http://www.tunafacts.com/news/tcs_04162004.cfm

and
http://www.healing-arts.org/children/vaccines/vaccines-mercury.htm

Thimerosal is metabolized in humans to ethylmercury, but guidelines for safe mercury intake relate only to methylmercury. The literature on ethylmercury toxicity was so scant that toxicologists did not know if ethylmercury was more or less toxic than methylmercury. Left with no choice, CBER analysts assumed that the toxicity of the ethyl compound was equivalent to the methyl compound.

Given this assumption, the mercury intake from vaccines in children six months old, 187.5 micrograms, was compared to the suggested safe limits for methylmercury intake published by three federal agencies: EPA, FDA, and the Agency for Toxic Substances and Disease Registry (ATSDR). Mercury intake through vaccination during the first six months of life exceeded the limit set by the EPA.

However, the EPA's reference dose, or RfD, was truly cautious, based on a single episode of methylmercury poisoning in Iraq in which 81 children were exposed to high levels of mercury in utero. The EPA calculated the RfD by determining the dose that produced a 10% prevalence of adverse neurological effects in the affected children, including late walking, late talking, and abnormal neurological scores. The agency then placed a 95% confidence interval around this dose and divided the lower bound of the interval by an "uncertainty factor" of 10 to arrive at the RfD.

Nevertheless, the Iraqi finding strengthened the anti-mercury argument, since its proponents maintained that mercury was most hazardous among children already susceptible for autism. Since most children are not susceptible, mercury might be acceptable for the majority, but devastating for the small minority.
[The rub: Doing studies on a small minority has to be very difficult due to the rarity of subjects to study and predicting which ones are the rare ones. Then, how many of those rare ones had high environmental exposure at just the wrong time where they may have become autistic without the vaccine anyway. All this stuff is not to say that using mercury in a vaccine is or ever was a 'good' idea. It's to point out difficulties in determining what a 'bad' idea is in the absense of data indicating that 'that' particular bad could be a factor. ODE]

The Iraqi children sustained long-term daily prenatal exposures, while vaccinated children have intermittent intramuscular doses later in life, as infants. No one knew how these exposure differences affected the potential neurotoxicity of mercury, or if they would.

Only two single-antigen pediatric hepatitis B vaccines exist on the U.S. market - Engerix-B (SmithKline Beecham) and Recombivax HB (Merck). Both contain thimerosal and 12.5 micrograms of mercury per 0.5 ml dose. The American Academy of Pediatrics pressed CDC to agree to a delay of the hepatitis B vaccination series, usually started at birth, for children born to hepatitis B surface antigen (HBsAg)-seronegative mothers. The Academy argued that the delay would only be temporary, because both Merck and SmithKline Beecham had promised that they could quickly shift manufacturing to thimerosal-free vaccine, perhaps in just a few months (the FDA had already promised to review applications for thimerosal-free hepatitis B vaccine within 30 days).

[But did they?]
http://www.fda.gov/cber/vaccine/thimerosal.htm#act
At present, all routinely recommended vaccines for U.S. infants are available only as thimerosal-free formulations or contain only trace amounts of thimerosal (<1 than micrograms mercury per dose), with the exception of inactivated influenza vaccine. Inactivated influenza vaccine for pediatric use is available in a thimerosal-preservative containing formulation and in formulations that contain either no thimerosal or only a trace of thimerosal, but the latter is in more limited supply; see Table 1. A more extensive tabulation of vaccines and thimerosal content may be found in Table 3.

[As CS users may know, the FDA tends to err on the safe side when confronted with things they are ignorant about until someone else studies it. Due to their funding structure, the FDA doesn't do many, if any, actual studies.]
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At 11:32 PM 8/30/2005 +0800, you wrote:
>
>Christine said: Rowena, I was being facetious. However, your correct
>Terpenes; monoterpenes and sesquiterpenes cross the blood brain barrier.
>
>Rowena: I think the answer is probably that at least some parts of the
>immunisation do cross the BBB:
>Google: "thiomersal in vaccines used according to the UK childhood
>immunisation schedule ... methylmercury is transported across the
>blood-brain barrier by an active ...
>www.immunisation.nhs.uk/files/thiomersalfsht.pdf " - from this document you
>will be amazed and delighted to find out that this stuff, added to prevent
>fungal and other spoilage, has "prevented many deaths from contamination of
>vaccine". - oh, and even more delighted to learn that there is no evidence
>of long term damage from using it.
>
>Facetiousness is fine by me.
>
>Rowena
>
>
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