The Hannah Poling case has raised many questions about vaccines and metabolic disorders (of which mitochondrial disorders is a subset). Which is a way of saying, yes, the paper we are about to discuss covers more than just mitochondria. But, would you have read this if you saw the title of the paper:
Attitudes regarding vaccination among practitioners of clinical biochemical genetics
But, don’t let that stop you. The paper takes a look at questions asked by many since the Hannah Poling case went public:
The issue of vaccination in patients with diagnosed—or undiagnosed—metabolic disease has been an important question for those of us who care for patients with inborn errors of metabolism, but has come to the fore recently as an item of general interest.
While it is acknowledged that there is a lack of hard data on many questions, the paper’s authors polled experts in the field with a series of questions about vaccines. For experts, they chose members of the Society for Inherited Metabolic Disorders (for which there were 379 email addresses: that gives us an idea of how specialized this field is). They received 111 responses. But, it is worth noting that they requested one response from each group, not individual, so they consider this to be a fairly complete response.
So, what do these experts think about vaccines and their patients with metabolic disease (mitochondrial or otherwise)?
When asked, to respond to the position: ‘‘I view the risk of vaccination in known metabolic disease patients to generally be outweighed by the risk of the infectious diseases being vaccinated against”
63.2% strongly agreed
31.1% agreed
0.9% disagreed
and 0.9% strongly disagreed.
Asked about the opinion that the risk of vaccination in metabolic disease was ‘‘greater than the risk of the infectious diseases being vaccinated against”
52.9% strongly disagreed
40% disagreed
3.5% agreed
and none strongly agreed
One idea that has been floating around the autism blogosphere and discussion groups is that metabolic specialists prefer an alternate vaccine schedule. Well, only 21.3% said that they recommend the routine vaccination schedule, it is true. But, 73.1% use the routine schedule plus the annual influenza vaccination. 5.6% recommended a modified schedule. If you’ve been adding this up in your head, you already know that none indicated no vaccination.
Since this is such a key question, let’s repeat: over 90% use the recommended schedule or the recommended schedule plus the flu vaccine.
Similar trends were noted for live-virus vaccines:
45.7% recommending restriction of the practice for none of their metabolic disease patients
44.8% for a few
6.7% for most
2.9% for all of their patients
A big question that comes up often is “how many Hannah Polings are there?”, which in this community is a fairly narrow question of “how many people have had adverse reactions to vaccines resulting in autism or autistic-features”. The paper asks the more broad question, how many groups have seen a patient suffer “long-term deterioration or adverse outcome attributable to a vaccination:
78.3% ‘‘never”
8.5% ‘‘once”
12.3% ‘‘seldom”seen this in a patient
Again, this is not to say that autism or autistic features were seen, or that mitochondrial disease was the metabolic disorder linked in the deterioration. The group is more broad than that.
Now, the flip side of that coin: how many groups have seen long term deterioration from a vaccine preventable disease:
48.5% replied they had ‘‘never” seen this
12.1% ‘‘once”
33% ‘‘seldom”
3% ‘‘routinely”
3.0% ‘‘frequently seen this in a patient
Asked if whether ‘‘the benefits of the current vaccination schedule outweigh the risks to patients with undiagnosed metabolic disease in the general population,”
64.8% strongly agreed
27.8% agreed
4.6% disagreed or strongly disagreed
An open ended question was posed as to whether there were ‘‘reasonable health policy changes you would make regarding undiagnosed metabolic disease patients”. 43 groups responded, 29 said no, 4 said “no” or “not sure” and 1 suggested adding additional influenza and/or pneumococcal vaccine. A few stressed evaluation by IEM specialist in any case with deterioration after vaccination.
There is some more. All good stuff. But, I am at risk of basically copying the entire paper here if I add it.
If there is one thing to take away from this, it’s the concluding paragraph:
In summary, it is clear that the general opinion held by practitioners in the field of Clinical Biochemical Genetics favors the full schedule of vaccination for their patients. The overwhelming majority also feel that the benefits of the current schedule outweigh the risks to individuals with undiagnosed metabolic disease. Most have never observed any significant adverse event which was attributed to a vaccine reaction. Some respondents have seen the association once or seldom in their careers, but none felt it to be frequent. The fact that there were few encountered events of long-term deterioration due to a disease for which vaccination is available probably simply reflects the low incidence of those diseases, due to the effectiveness of vaccination practices. A panoply of questions remain, however, and there is a great need for more data.
B BARSHOP, M SUMMAR (2008). Attitudes regarding vaccination among practitioners of clinical biochemical genetics Molecular Genetics and Metabolism, 95 (1-2), 1-2 DOI: 10.1016/j.ymgme.2008.08.001
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