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Originally Posted by IggytheBorg 
I personally am not so quick to dismiss the possible correlation. The causes of autism are not fully understood. I read an article last year, in Time or Newsweek, or maybe Nat Geo, that said there was some evidence exposure to heavy metals, particularly mercury, can be a possible cause. They pointed to a town in the Midwest where firefighters who had worked to put out a fire at a factory that used mercury in its processes had a much higher incidence of autistic births among their children than the surrounding population, suggesting to the researchers exposure to the heavy metals in the line of duty may be the cause. Mercury is used to preserve many vaccines. While I agree the correlation between vaccinations & autism is not proven & hotly disputed, I have a nephew who was diagnosed - who developed the symptoms - shortly after receiving a heavy round of vaccinations. He's got a fairly mild case, but even so it's clear he's not "normal". The idea of my son (now 3) ending up like that or worse frankly terrifies me, and my wife, too. I see no harm in spacing out the vaccines rather than getting them in large bundles, as was the usual method for years, just to be on the safe side. They probably thought Thalidomide wasn't the cause of birth defects for awhile, too.
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I wasn't going to wade in here because so many of you have expressed such firm belief that there is no correlation between vaccination and autism. As you know my profession you probably infer where I stand on the issue of vaccination. I am not against vaccination, I am for informed choice. I do not vaccinate my children and when I have parents asking questions I educate them about possible links as well as the things one must do prevention-wise and treatment-wise should you choose not to vaccinate.
I stepped in because you mentioned mercury. The problems with vaccines and their potential link to autism are not simply limited to mercury though.
1) Pertussis- The DPT shot(or Death, Pain and Trouble shot as it was termed) was the most notorious for causing vaccine related injuries and deaths. So much so that it was reformulated in 1996 to DTaP or acellular pertussis. Pertussis vaccines, both prior to and since 1996, contain aluminum to make them more functional. Pertussis toxin easily crosses the blood brain barrier and brings this aluminum with it. Pertussis, both wild caught and vaccine induced carries with it a high degree of encephalitis or brain inflammation. This brain inflammation carries with it a high risk of death and a mild to moderate risk of neural tissue damage. Aluminum is toxic to neural tissue much the same way that mercury is. It also makes the blood brain barrier more permeable making it more likely that other toxins can cross through and disrupt neural tissue. Cases of reaction, injury and death are still reported from the DTaP shot.
2) Mercury- In 1999 the federal government said they wanted mercury removed from vaccines routinely administered to infants and children. The manufacturers began to remove this in 2000 yet were allowed to leave already manufactured stock on the shelves even though the government had admitted that mercury was not safe. In 2001 the Institute of Medicine recommended that thimerosal be removed from all vaccines administered to pregnant women, infants and children. This included flu shots but the CDC has yet to fully act on this. It was 2004 before one could safely say that mercury was not present in the majority of vaccines.
According to the EPA, one in every six women of childbearing age already have blood levels of mercury high enough to cause neurological damage to their unborn children due to environmental exposures alone. You mentioned firefighters. I am going to make an assumption that many of them were male and therefore if the correlation was made that the mercury toxicity affects gametes or sperm cells as well and is thusly passed on to children.
As of 2003 the only vaccines routinely administered to infants and children still containing mercury should be the
flu vaccines. However the change in CDC requirements for children aged 2-5 regarding flu shots means they are still potentially exposed to mercury toxicity levels prior to the reduction of thimerosal in 2000.
3) Combination shots- It has been theorized that combination shots such as MMR, DPT(DTaP) and Influenza(which contain multiple strains as the CDC makes a statistical guess each year as to which strains will "hit" and they order vaccines tailored to those. That is why every few years we get a flu outbreak and the shots don't seem to help. Occasionally the guesswork doesn't work out right.) put too much of a load on the developing immune systems of children. Giving combination shots as well as multiple shots at the same time increase this loading and contribute to a theorized overwhelming of the system. As the system becomes overwhelmed the defense mechanisms drop and the likelihood of high fevers and low grade encephalitis increase.
4) Developing Tissues- It is theorized that the developing immune and neurological systems of infants just cannot take the onslaught of
thirty vaccines prior to the age of two. Japan, at least, as well as a few other developed nations have moved their "mandatory" vaccination schedules back so that they do not begin until the age of two.
The above items are all things I counsel patients who seek my advice about vaccination with. As the pediatrician is telling them how great vaccines are I simply provide the other side and tell them to make the best decision for themselves and their children. If they choose to vaccinate I make a recommendation that they delay onset until the age of two and then allow only single doses and non-combination shots to be given.
Vaccine theory is inherently flawed once you consider that many vaccines don't confer long lasting immunity thus the need for "boosters." However studies show that in some cases, measles for instance, that vaccines may only provided immunity for a few months before titers disappear from the blood. The booster being several years apart in most cases though.
The mechanism for infection of most diseases "treated" via vaccine is usually a mucous membrane introduction to the body not intramuscular. Therefore the antigen-antibody reaction isn't being stimulated the way the immune system expects it to. This has been theorized as a why for the above mentioned inefficiency of vaccines.
The diseases that vaccines "treat" are no longer the scourges they were at the turn of and through the beginning of the 20th century. Advancements in sanitation and treatment have been the deciding factor here, not vaccines. Also when vaccines are introduced there is usually a routine "tweaking" of the diagnostic criteria that inevitably leads to a massive reduction in cases and the vaccine is lauded as the champion.
Polio, prior to the introduction of its vaccine, was diagnosed by examination of paralysis present on two separate occasions at least a day apart. After the vaccine was introduced the diagnostic criteria was changed to indicate paralysis that was present six weeks after initial exam. Of course cases are going to drop dramatically once the misdiagnosed are weeded out.
I could go on and on about whether or not HepB or chicken pox is even something that should be on the schedule linked above.
As for a cure? Autism isn't a behavioral modification issue and it is far from an evolutionary advantage. Autism is a neurological disorder.
Rain Man is not the case for most people with autism. I highly doubt a cure can be found for something that is at best an improper wiring of the brain and at worst damaged brain tissue.