Revaccination refers to the process of receiving additional doses of a vaccine, usually after the initial doses have already been administered. It helps to boost the immune response and provide extended protection against a particular disease.
Full definition
The practice of annual vaccination in our opinion should be considered of questionable efficacy unless it is used as a mechanism to provide an annual physical examination or is required by law (i.e., certain states require
annual revaccination for rabies).
The following update discusses use of serologic viral antibody titers for determining the need
for revaccination of healthy pets (see Antech News, April; 1998 for background).
Unfortunately, the great majority
of revaccination of adult dogs is unnecessary and never explained.
For example, in 2003 task force member Dr. Richard Ford, Professor of Medicine, North Carolina State University, said that the decision to recommend a 3 - year
revaccination schedule for core vaccines was a compromise.
Many practices still
revaccination at yearly or triennial intervals even now, despite recommendations to not vaccinate needlessly coming from the AVMA, AAHA and the AAFP.
Task force member Dr Richard Ford, Professor of Medicine, North Carolina State University, said that the decision to recommend a three
year revaccination schedule for core vaccines was a compromise.
In fact, Christine was quite influential in forcing the state of Maine to change its annual
rabies revaccination requirement from annually to every three years.
Many vets and pet owners are fond of using titers to determine whether a dog
requires revaccination with the understanding that a low titre equals low immunity.
Why would the AAHA
recommend revaccination when faced with research showing that those vaccines were extremely likely to protect dogs and cats for life?
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The 2011
revaccination guidelines state: «every 3 years or more» with the following comment: «Among healthy dogs, all commercially available [core] vaccines are expected to induce a sustained protective immune response lasting at least 5 yr.
Then the dog needs a booster a year later followed
by revaccination every three years.
In some states, a veterinarian is permitted to exempt a senior dog from rabies
revaccination on the basis of possible threat to health.
A booster vaccination will be given in one year and
then revaccination will occur every three years after that.
Clinical application of serum parvovirus and distemper virus antibody titers for
determining revaccination strategies in healthy dogs.
Once your dog reaches adulthood, your veterinarian will discuss the appropriate vaccination schedules for your dog including the need for
booster revaccination.
Some vets are able to see through the politics and money that
drive revaccination while others can't.
That same article by Drs. Schultz and Phillips goes on to say: «Furthermore,
revaccination fails to stimulate a secondary response as a result of interference by existing antibodies.»
And tell the USDA to grant us easy access to reported adverse reactions for all companion animal vaccines, and to allow only scientifically -
proven revaccination recommendations on vaccine labels.
The recommendation to vaccinate annually was based on the assumption that immunity would wane in some dogs, thus to ensure immunity in the population, all dogs required
revaccination since it was not practical to test each animal for antibody.
The veterinary profession risks losing credibility when pet owners discover crucial information
about revaccination has been withheld from them for years.
«In our studies, puppies vaccinated annually with modified live CPV - 2, CDV and CAV vaccines received no added benefit from annual
revaccination throughout a period of 7 years when compared to dogs that were vaccinated as puppies then challenged with virulent virus at 7 years of age.
Many dog owners are still not being advised that there is no scientific evidence to support annual OR
triennial revaccination with core modified live virus (MLV) vaccines for parvovirus, distemper virus and adenovirus.
Immunity to most infectious diseases gradually declines over time, so
periodic revaccination is generally necessary.
I suspect that many pet owners are still not being informed that there is no evidence to
support revaccination of already immune animals with so - called «booster» shots, nor that there is the option of titre testing to verify a response to core MLV vaccination.
Ms Arthy, on what evidence does the APVMA continue to re-register canine core MLV vaccine products which recommend
repeated revaccination of adult dogs?
Animals that have expired vaccinations should be evaluated on severity of exposure, time elapsed since last vaccination, number of previous vaccinations, current health status and local rabies epidemiologic factors to determine the need for euthanasia or
immediate revaccination and observation with isolation.
Many states like New York require
revaccinations at three - year intervals which is the longest.
Afterward, he said that the decision to recommend a three year
revaccination schedule for core vaccines was a compromise.
Adult cats whose vaccination history is unknown should receive a single FVRCP followed by a booster one year later before starting the 3
year revaccination schedule.
This could help reduce the number
of revaccinations for specific pathogens or the relapse of cancer.»
That is why we are trying to prevent annual
revaccination with the Core Vaccines that provide long term immunity in a majority of most dogs, but not all!»
Also, Schultz says, it's important to understand that while your dog may not likely need frequent (if any)
revaccination as an adult for distemper, parvo or adeno, other vaccines do require booster, even annually.
Sometimes the vaccine induced protective immunity lasts for years without needing a repeat (booster) vaccination; however, some diseases need
yearly revaccination to keep immunity at a protective level.
Yearly re-vaccination is also recommended by the vaccine manufacturer and FDA, however, recent evidence suggests that adult pets have longer immunity and that
revaccination on an every other year or every three year basis may be adequate.
Excessive puppy shots, booster shots, and
rabies revaccinations can destroy health and shorten the lives of our beloved pets.
Phrases with «revaccination»