Sunday, March 06, 2011

The Danish MMR studies

I have been reading several studies that investigate whether there is a connection between MMR vaccination and autism. The Danish data on which these studies are based are identical. The two studies that categorically state that the MMR vaccine does not cause autism are written up in the New England Journal of Medicine and in Pediatrics Magazine. A third study written up in the Journal of American Physicians and Surgeons states that there is a connection between MMR vaccine and autism.

By my standards the latter article An Investigation of the Association Between MMR Vaccination and Autism in Denmark has almost all of the hallmarks of a bona fide study. It explains in detail how the study was done and how to properly statistically assess data for such a complicated piece of work. There are tables and graphs that show clearly all the useful information to support G.S Goldman's and F.E. Yazbak's conclusion that there is a connection of MMR vaccine to autism. The other two articles do not show the same care. Indeed they seem to lack transparency and detail.

What, however, is missing in all three articles is an account of all the vaccines that were given during the time period between 1991 and 2000. Just because other vaccines (DTaP, HepB, pneumonia, flu, etc.) that were, in fact, given at the same time as the MMR vaccine do not contain mercury, does not mean that they were free of other adjuvants (aluminum, formaldehyde etc.) that might cause autism.


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