Stories tagged autism
Take your time and think it through, guy: But don't worry about the MMR vaccine.
Courtesy paul+photos=moodyLet’s be careful how we put our words together, everybody.
I mean, when I get dressed in the morning, I know that I want to get underwear, socks, pants, and at least one shirt onto my body. However, if I were to forgo all rules of dressing order and arrangement, I might give off the wrong message: i.e., I’m crazy, and possibly dangerous to be around.
Why would I take any less care with my precious, precious words?
Because I’m pretty lazy, I don’t generally read most (any) of the articles on science that I come across every day. Instead, I read only the headlines. Or, better yet, I have them read to me—that way I can rest my head on my desk while I’m taking in the news. It’s very important, then, that all headlines are clearly worded. Otherwise I could dictate a Science Buzz post that is even more factually inaccurate than my posts normally are. That’s dangerous territory.
“Survey confirms parents’ fears, confusion over autism.”
I looked at that headline, saw the word “vaccine” in the body, and thought, “Oh, snap! Vaccines do cause autism?” Because, that’s what parents’ are afraid of, after all.
Nope. The existence of parents’ fear and confusion over autism is what has been confirmed here. The actual connection between vaccinations and autism remains non-existent.
A recent study found that a significant percentage of parents still believe that the measles, mumps and rubella vaccine can cause autism, or are at least uncertain and fearful that such a connection does exist. This is despite the fact that scientists can establish no connection between early childhood vaccines and the development of autism.
The fear that early childhood vaccinations lead to an increased risk for autism originated from a 1998 study that linked autism to a particular mercury-based preservative in the MMR vaccine. It was later revealed that the study was based on bad research, and it was retracted by most of its authors and disowned by its publisher. In 2001, manufacturers of the MMR vaccine began removing the preservative from their vaccines anyway—and that’s probably not a bad thing, but it hasn’t lead to any decrease in the occurrence of autism. And people are still worried about the vaccine anyway.
This confusion wouldn’t be such a big deal, except that the better-safe-than-sorry attitude towards not having children vaccinated has lead to a resurgence in diseases that had essentially been eradicated in areas where the vaccine is available.
Science Buzz has had a lot of conversation on this subject already, and, if you’re interested, I’d recommend you check out some of the other posts on autism and vaccinations.
Tags : We're back in business here at the Science Museum (although the building is still closed to the public until next Friday), just in time to report some good news.
Ouch: Taking one for the team?
Courtesy Spamily
The CDC reported yesterday that 77.4% of US children between the ages of 19 months and three years received all their recommended vaccinations in 2007. That's a slight improvement over the 2006 statistic. There are big regional variations in coverage, and children living below the poverty line are slightly less likely to be fully vaccinated, but overall less than 1% of US kids received no immunizations at all.
What are the recommended shots?
- Four or more doses of diphtheria, tetanus toxoid, and any acellular pertussis vaccine, or DTaP
- Three or more doses of polio vaccine
- At least one dose of measles, mumps, and rubella (MMR) vaccine
- At least three doses of Haemophilus influenzae type b vaccine
- At least three doses of hepatitis B vaccine
- At least one dose of varicella vaccine
Some folks don't vaccinate their kids--particularly against measles, mumps, and rubella (MMR)--because they worry that the vaccine is linked to autism. That theory has been debunked many times, in many countries, but it persists. On Wednesday, researchers from Columbia University and the CDC offered up another study showing zero causal relationship between the MMR vaccine and autism (or gastrointestinal problems.) So kids, roll up your sleeves at those back-to-school physicals and get your shots. It sucks, but it beats getting measles.
On the other hand, evidence is mounting to show that flu shots don't work well to protect people over 70. Older people have a lesser immune response to the vaccine and don't develop as much immunity. But the very old and the very young also account for the highest number of flu deaths. So what to do? According to the NT Times article:
"Dr. Simonsen, the epidemiologist at George Washington, said the new research made common-sense infection-control measures — like avoiding other sick people and frequent hand washing — more important than ever. Still, she added, “The vaccine is still important. Thirty percent protection is better than zero percent.”
Another way to protect the elderly is to vaccinate preschoolers. Not only are they likely to pick up the flu before other members of the family, but there's some evidence that preschoolers are actually the drivers of annual influenza outbreaks. Stop the flu in young kids, and you might just stop it for everyone else, too.
Researchers at Vanderbilt University have identified a common genetic variant that more than doubles a person's risk for autism. But since about 47% of the population carries the variant, the scientists figure that an unidentified environmental factor must also be at play.
Sucked in: Will this harm your development?
Autism is a serious concern in our country today, with 1 out of every 166 children diagnosed with some form of the disorder. But could the sharp rise in Autism (it was only 1 in 2500 30 years ago) be linked to the increased prevalence of TV in our homes? Economists from Cornell University say that the data shows a pretty strong correlation.
Michael Waldman and Sean Nicholson looked at populations in California, Oregon, and Washington using the Department of Labor's American Time Use Survey. They compared this information with clinical autism data and found a statistically significant correlation between and increase in early childhood hours spent watching TV and autism rates.
Is that science?
Well, the authors of the study will be the first to say that this isn't definitive proof that TV causes autism (or that autism causes TV...sorry, bad joke). And these guys are economists looking at population data not medical scientists studying individuals with autism. But that doesn't mean this study is without merit. Something in our environment causes autism and we don't really know what it is. I support any unique thought on the subject that gives us new research questions to evaluate.
Do you have a story or thought on autism? Have you heard of other possible causes of autism?
A study published in the most recent issue of Pediatrics shows that the rate of autism and related disorders increased even as thimerosal (a mercury preservative) was eliminated from vaccines and fewer children received the MMR vaccine. The study looked at 28,000 children over 11 years. This and other studies confirm that there is no evidence to suggest that the MMR vaccine increases the risk of autism.
Doctor who incorrectly linked autism and vaccines will face charges
The Lancet disowned his study, his co-authors spoke out against his research, and he has some major conflicts of interest. Now the UK doctor, Andrew Wakefield, will faces charges that he "published inadequately founded research," and more.
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