Without question, vaccination has been one of the most important interventions in disease prevention that has ever been developed. In spite of the demonstrable, and ongoing, success of vaccination, a small, but vocal, anti-vaccination movement has developed in human medicine, occasionally buttressed by horrifying instances of adverse reactions, as well as the occasional publications in scientific journals (vis, the Wakefield debacle). Vaccine development continues, and human health continues to benefit, as new vaccines are developed and tested prior to release.
In veterinary medicine, vaccination has also proven to be a boon for animal health. Diseases such as canine parvovirus and canine distemper, feline leukemia, or equine tetanus, have been greatly reduced – in some cases, nearly eliminated – by vaccination. And, as in human medicine, a small, but vocal, anti-vaccination movement has developed, regaling fearful listeners with tales of acute harm, or chronic, low-grade disease (sometimes termed “vaccinosis”).
One of the occasional arguments used in support of “alternative” approaches to human medicine is the observation that since “alternative” medicine is used (with anecdotal success) in animals, and animals don’t know anything about the treatment that they’re getting, then they must work a priori. Of course, the fallacy of such an observation is pretty obvious to anyone with a logical/skeptical frame of mind, because it assumes that the therapies do work (even though there’s little evidence of that).
Clearly, however, some people perceive that the therapies work, including veterinarians – there are veterinary acupuncturists, chiropractors, homeopaths, etc., etc. Since there’s very little scientific support for the idea that the therapies actually have any clinically significant effect on biological processes, including the processes that result in disease, questions arise as to whether there are other effects of “alternative” treatments on animals. Specifically, people may wonder whether or not animals can benefit from placebo effects.