Caplan, director of the Center for Bioethics at the University of Pennsylvania, tries to lay to restonce and for allthe myth that vaccines are linked to autism.
What must it be like to spend a huge amount of time every waking day trying to change public health practiceonly to find out that you were wrong?
That is precisely what has happened to the proponents of the theory that mercury in vaccinescontained in the preservative thimerosal, which once was used (and is used no longer) in vaccinesis responsible for a nearly 20year explosion in autism and other neurological disorders among American children.
This urban legend has had very realand terribleconsequences. It has led, and continues to lead, many parents to avoid getting their kids and themselves vaccinated against lifethreatening diseases. The failure to vaccinate has caused many preventable deaths and avoidable hospitalizations from measles, whooping cough, diphtheria, flu, hepatitis and meningitis. And fear of vaccines puts each one of us at risk that we, our children or grandchildren will become part of a deadly outbreak triggered by someone whose parents avoided getting their child vaccinated for fear of autism.
Recent research on many fronts in medicine and science has nailed the coffin shut on the mercuryinvaccinescausesautism hypothesis.
The connection is just not there. Perhaps the key fact, which has garnered little attention, is that thimerosal has been removed from vaccines in this and other countries for many years, with no obvious impact on the incidence of autism. The most recent data point toward a correlation with nothing at all to do with vaccines: the increasing age at which people (particularly men) have children seems to be associated with an increase in autism and other neurological problems.