Lifelong Immunity – Why Vets Are Pushing Back

The duration of lifelong immunity for Rabies vaccine, Canine distemper vaccine, Canine Parvovirus vaccine, Feline Panleukopenia vaccine, Feline Rhinotracheitis, feline Calicivirus, have all been demonstrated to be a minimum of 7 years by serology for rabies and challenge studies for all others.

In the Duration of Immunity to Canine Vaccines: What We Know and What We Don’t Know, Proceedings – Canine Infectious Diseases: From Clinics to Molecular Pathogenesis, Ithaca, NY, 1999, Dr. Ronald Schultz, a veterinary immunologist at the forefront of vaccine research and chair of the University of Wisconsin’s Department of Pathobiological Sciences, outlines the DOI for the following vaccines:

Minimum Duration of Immunity for Canine Vaccines:

Distemper- 7 years by challenge/15 years by serology
Parvovirus – 7 years by challenge/ 7 years by serology
Adenovirus – 7 years by challenge/ 9 years by serology
Canine rabies – 3 years by challenge/ 7 years by serology

Dr. Schultz concludes:  “Vaccines for diseases like distemper and canine parvovirus, once administered to adult animals, provide lifetime immunity.”  “Are we vaccinating too much?” JAVMA, No. 4, August 15, 1995, pg. 421.

Yet vets continue to vaccinate annually.  Dog owners feel that their vets are doing their dogs a great service by vaccinating every three years instead of annually – why do we allow it when these studies were done over thirty years ago and have been replicated time and again by other researchers?

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