It’s pretty unusual for John McCain, Hillary Clinton, and Barack Obama to agree on a controversial subject. It’s even more unusual for them to agree and to contradict the available evidence, but apparently that’s the case today on the subject of vaccines and autism.
I mentioned this briefly earlier, but since I did a post about it when McCain was wrong last month, I suppose it’s only fair that I criticize all three of the candidates.
Here’s McCain on the subject several weeks ago:
At a town hall meeting Friday in Texas, Sen. John McCain, R-Ariz., declared that “there’s strong evidence” that thimerosal, a mercury-based preservative that was once in many childhood vaccines, is responsible for the increased diagnoses of autism in the U.S. — a position in stark contrast with the view of the medical establishment. […]
McCain said, per ABC News’ Bret Hovell, that “It’s indisputable that (autism) is on the rise amongst children, the question is what’s causing it. And we go back and forth and there’s strong evidence that indicates that it’s got to do with a preservative in vaccines.” McCain said there’s “divided scientific opinion” on the matter, with “many on the other side that are credible scientists that are saying that’s not the cause of it.”
Here’s Obama on the subject yesterday:
“We’ve seen just a skyrocketing autism rate. Some people are suspicious that it’s connected to the vaccines. This person included. The science right now is inconclusive, but we have to research it.”
And here’s Clinton, responding to a recent candidate questionnaire:
“I am committed to make investments to find the causes of autism, including possible environmental causes like vaccines…. We don’t know what, if any, kind of link there is between vaccines and autism — but we should find out.”
The science seems to suggest that all three are wrong.
The WaPo’s Michael Dobbs reported today:
[T]he overwhelming weight of scientific opinion is that there is no proven link between autism and the vaccines which include a mercury-containing preservative known as thimerosal. A senior official at the Centers for Disease Control, Dr Edwin Trevathan, told reporters in March that the Poling case did not demonstrate any link between vaccines and autism.
At least five major studies have found no link between autism and thimerosal. A study released by the California Department of Public Health in January found that the autism rate in children rose continued to rise [sic] even after vaccine manufacturers stopped using thimerosal in childhood vaccines after 2001.
According to the Centers for Disease Control, “there’s no convincing scientific evidence of harm caused by the low doses of thimerosal in vaccines, except for minor reactions like redness and swelling at the injection site.” Similar conclusions have been reached by the American Academy of Pediatrics and the Food and Drug Administration.
Summaries of the scientific studies are available from the National Institutes of Health and the Institute of Medicine. Both Obama and Clinton have pledged to increase funding for autism research and possible links with vacines.
According to Dr. Paul Offit, chief of infectious diseases at the Children’s Hospital of Philadelphia, the connection between vaccines and autism is nothing more than a sad coincidence.
My hope is that all three candidates are just ill-informed on the subject. This isn’t a question they’ve studied in any detail, they’ve heard rumors and/or snippets of reports, and they’ve been led to believe scientists are far more divided on this than they really are.
Hopefully, when confronted with having to make an actual policy decision on this, all three would get a helpful, thorough briefing, and be persuaded by the evidence. In the meantime, though, it’s not helpful, from a public health perspective, to have all three major presidential candidates raising doubts about the benefits of childhood vaccinations.