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An article criticising the rejection of vaccinations by chiropractors as based on "philosophy" and not scientific evidence: "The chiropractic anti-vaccination position was established by D. D. Palmer by likening vaccines to "filthy animal poisons". Palmer's views resulted not from any objective analysis of scientific data, but from a visceral rejection of anything he perceived to be associated with the medical profession of the day. His anti-immunization position was a narrowly dogmatic one that did not allow for any scientific advancements or the introduction of new data. In the face of now overwhelming evidence to show that vaccination is a highly effective public health procedure, Palmer's modern followers have turned to whatever sources they can to support chiropractic's archaic anti-immunization position. However, our preliminary analysis suggests that current chiropractic anti-immunization arguments rely heavily on highly biased and selective misrepresentations of the scientific literature by a small group of authors whose credibility as authorities on vaccination remains questionable. Opposition to immunization by some in chiropractic may be purely "philosophical", not scientific; nevertheless, this does not justify the dissemination of innuendo, half-truths and false information to support this position." Journal of Manipulative and Physiological Therapeutics (June 2005)