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There will always be disagreements about vaccinations and how often one should vaccinate! The articles below are against annual vaccinations. At the bottom of the page are links to vaccination sites which are more complex in their detail and recommend annual vaccinations.  I suggest that you read any available material thoroughly and do your own research. Discuss it with your own Veterinarian before making any decisions!

Whilst all care is taken, we will not be held responsible for the accuracy of any information contained on this site. Any errors or omissions will be corrected upon notification. Any articles, statements and opinions expressed on our site are not necessarily the opinion of Chinaroad Löwchens of Australia.

From the AVMA Principles of Vaccination

There is evidence that some vaccines provide immunity beyond one year. Revaccination of patients with sufficient immunity does not add measurably to their disease resistance, and may increase their risk of adverse post-vaccination events. Vaccination is a potent medical procedure with both benefits and associated hazards.

It is not currently possible to determine the immune status of a patient relative to all the infectious diseases of concern without conducting a challenge test. Serology does not predict a patient's immune status for most diseases. For those diseases where serology has predictive value of a patient's immune status, the variation within and between laboratories renders the procedure generally unreliable.

Adverse events may be associated with the antigen, adjuvant, carrier, preservative, or a combination thereof. Possible adverse events include failure to immunize, anaphylaxis, immunosuppression, autoimmune disorders, transient infections, and/or long-term infected carrier states. In addition, a causal association in cats between injection sites and the subsequent development of a malignant tumor is the subject of ongoing research. The role of genetic predisposition to adverse events needs further exploration and definition.

Vaccine program goals include providing optimal immunity against clinically relevant diseases the patient is at-risk to contract, while minimizing the potential for adverse events.

...Biological agents are regulated by the USDA, not the Food and Drug Administration, and thus are not subject to those regulations that address extra label use. Veterinarians can legally use vaccines in a discretionary manner.
USDA licensing at the full approval level provides a baseline standard for efficacy, safety, purity, and potency, but the clinical need (relevancy) or usefulness (applicability) of a product are not assured by the licensing process. The USDA must approve labels for biological products. However, current labels frequently contain revaccination interval recommendations based on historical precedence and regulation rather than scientific data, may fail to adequately inform practitioners about optimal use of the product, and the testing methods may be inadequate to identify rare but relevant safety concerns. [2001]

Vaccinations in Veterinary Medicine: Dogs and Cats
By 1996 Don Hamilton, DVM

A practice that was started many years ago and that lacks scientific validity or verification is annual re-vaccinations. Almost without exception there is no immunologic requirement for annual revaccinations. Immunity to viruses persists for years or for the life of the animal. Successful vaccination to most bacterial pathogens produces an immunologic memory that remains for years, allowing an animal to develop a protective anamnestic (secondary) response when exposed to virulent organisms. Only the immune response to toxins requires boosters (e.g. tetanus toxin booster, in humans, is recommended once every 7-10 years). And no toxin vaccines are currently used for dogs and cats. Furthermore, revaccination with most viral vaccines fails to stimulate an anamnestic (secondary) response as a result of interference by existing antibody (similar to maternal antibody interference). 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). 

Summary: Yearly "boosters" are unnecessary, provide no benefit if given (will not increase immunity). Thus boosters are either a legal issue (Rabies) or a manipulation issue (inducing clients to come in for examination rather than directly suggesting an examination).

The issue of initial vaccination is less clear than that of boosters. Many clinicians feel that without vaccination they would see outbreaks of disease, particularly canine parvovirus disease. This can be a difficult issue to resolve. A fundamental dilemma is that vaccination in effect leads to weakening of the gene pool, and thus the overall health of a given population. One way this occurs is by allowing individuals to live that would otherwise succumb to disease, such disease being a natural means to "cleanse" and thus strengthen that population. This naturally presents an ethical quandary these days (our understanding of native or aboriginal thinking suggests that letting weak individuals die was implicitly understood to be not only acceptable but proper). Western society values the individual's right to be, therefore we make efforts to save all individuals. Any answer to this question naturally lies with the individual(s) involved. The second, and more compelling theory of the mechanism of interaction between a vaccine and the body suggests that vaccines "protect" against the acute disease not by preventing the disease but by changing the form of the disease to a chronic disease. 2 For example, the panleukopenia virus of cats induces an intense, rapidly progressive malfunction in the digestive tract, leading to vomiting and/or diarrhoea. In adult vaccinated animals this translates into a chronic state of diarrhoea and sometimes vomiting. This disease is known as inflammatory bowel disease (IBD), an autoimmune disease of the intestines. IBD has been occurring at near epidemic levels over the past several years; no other reasonable explanation has been proposed for the proliferation of cases of the disease. Vaccinations are known to be a major trigger of other autoimmune processes in susceptible individuals, 3 so it is reasonable to suspect vaccines as a trigger for IBD. Another aspect of panleukopenia virus infection, implied by the name of the virus, is vastly lowered numbers of white blood cells and corresponding immune deficiency. Could the appearance of Feline Leukaemia virus disease and later Feline Immunodeficiency virus disease be related to vaccination for panleukopenia during the previous two decades? The logicality of this theory does not allow easy dismissal of a relationship, most likely cause and effect. Both of the latter diseases produce low white blood cell counts and immunodeficiency as part of their symptom complexes. Similar connections have been proposed between Canine Distemper virus disease and both kennel cough and Canine Parvovirus diseases as "distemper" includes a pneumonia component as well as severe diarrhoea. Chronic coughing is characteristic of kennel cough; parvovirus disease affects the intestines, producing severe diarrhoea and vomiting. Additionally, the incidence of inflammatory bowel disease in dogs appears to be on the increase in the past year or two. Vaccination of dogs for Canine Parvovirus has been in effect for fifteen years, contrasted with the much longer history of parvovirus vaccination in cats (Feline Panleukopenia virus is a member of the parvovirus family). This portends a frightening future for dogs if the connection is indeed correct. Finally, connections are proposed between vaccination for Rabies and increasing numbers of fearful, aggressive animals. Behavioral problems of the extent seen today are a recent occurrence, being rare only two to three decades ago. 4 Their emergence is coincident with the practice of repeated adult vaccination, suggesting the need to examine that relationship. Aggressive behavior has been observed in dogs for several days following vaccination for rabies, even with non-infectious [killed] vaccines.5, 6

As practitioners sharing responsibility for the well being of patients, veterinarians are faced with a challenge when dealing with acute diseases. Vaccinations may prevent these acute diseases, but if the exchange is for a lifetime of chronic disease, is that a viable option? (Viable is from the French vie, meaning life, so the question is will the patient live and flourish or simply exist.)

First, remembering that booster vaccines are unnecessary, we can stop all vaccination after one year of age for virtually all diseases. (cf. below; Rabies is required by law so we need to work to change the laws so that they are in accordance with the fact rather than fear.) As repetition naturally increases the likelihood of problems, we can reduce side effects tremendously with no additional risk to the patient, simply by stopping adult boosters. Of course, there will still be some risk involved with even the initial vaccinations, but no risk of contracting the acute disease once the animal is immunized by these first vaccines. See below for duration of immunity to the various diseases for which vaccines are available.

Secondly, all vaccines should be administered as single antigens. (An antigen is something that is capable of eliciting an immune response, in this case a viral or bacterial organism from which a vaccine is produced.) This means not using the polyvalent vaccines which have become so common these days. Natural exposure to diseases is usually one at a time, and the body is probably more successful at responding to only one antigen and producing immunity without adverse effects, rather than responding to a complex of antigens. Therefore, rather than giving a group of antigens together at three to four week intervals, individual components should be given using an alternating schedule with a minimum of repetition. (Cf. below)

Thirdly, only immunize for diseases which meet all of the following criteria:

1. The disease is serious, even life threatening.
2. The animal is or will be exposed to the disease.
3. The vaccine for the disease is known to be effective.
4. The vaccine for the disease is considered safe.

Let us take Feline Leukaemia virus (FeLV) disease as an example. An indoor only cat will not be exposed as this requires direct, intimate, cat-to-cat contact. Many veterinarians recommend immunizing indoor cats against this disease. I feel this is unethical. This disease does not fit criteria number three or four anyway in my experience, so vaccination is unwarranted in most if not all circumstances. Feline Infectious Peritonitis (FIP) virus disease is another disease which fits neither three or four. FIP vaccine has generally been found ineffective and has produced severe side effects. Among the side effects I have observed with both FIP and FeLV is induction of the clinical disease they were intended to prevent. In dogs, Canine Hepatitis (CH) virus is almost nonexistent (the vaccine virus to prevent CH is Adenovirus-2). Leptospirosis is extremely rare and often not the same serotype used in the vaccine 7 and the bacterin for "lepto" is very prone to side effects. Coronavirus disease was never a serious threat except to dog companions' bank accounts, the same being true for Lyme disease except possibly in very small regions. Kennel cough disease is generally not serious (criteria one), and one study showed immunization to be ineffective or even counterproductive. 8 Immunization should be limited to high risk circumstances, if at all. A similar situation exists with the feline upper respiratory diseases; most are not serious except in very young kittens who contract the disease before vaccines are typically administered. Rabies is another disease for which indoor cats and well confined dogs have no exposure, so the vaccine is clinically unnecessary although required by law.

Fourth, vaccines should NEVER be given to unhealthy animals. This is a practice that is gaining popularity among veterinarians for some strange reason, and it goes against the recommendations in all vaccine inserts as well as those of virtually all immunologists. This is malpractice in my opinion.

A bolder option is to refuse immunizations entirely, recognizing the inherent risk in administration of even one vaccine into the body, and being willing to accept the risk of not immunizing. While risk does exist if animals are unvaccinated, it can be moderated significantly by feeding better quality foods (home prepared, including fresh, raw meats) and by limiting exposure until the animals are six to eight months of age. An unvaccinated animal will be significantly less likely to suffer from allergies and many health problems. Skin allergic reactions have been associated with vaccine administration, 9 and tremendous numbers of dogs and cats have skin allergies today. Some other diseases for which links to vaccines are known or suspected include epilepsy, thyroid disorders 10 (hyper- and hypothyroidism), chronic hepatitis, renal failure, cystitis or lower urinary tract disease (particularly in cats), autoimmune hemolytic anaemia, 11 neurologic diseases such as confusion and inability to be "present", asthma, and so on. In humans sudden infant death syndrome is strongly linked to DPT vaccination, 12 as are attention deficit disease/hyperactivity and autism, 13 among many others including severe brain damage.

Why are vaccines worse than natural exposure? Probably the major factors are the artificial means by which exposure is created with vaccines and the repetition. With few exceptions (primarily rabies and occasionally Feline Leukaemia virus or Feline Immunodeficiency virus), infectious organisms are transmitted via oral and nasal exposure, and this response begins at the oral/nasal level with recognition of a foreign material or organism, followed by initial non-specific destruction and elimination of the organism at the local site of exposure as well as within the blood stream whence an organism may not even reach the interior to cause deep illness, but may be successfully repelled at the periphery. In other cases the body would have a lag time of several hours or even days to begin mounting a response before the "invader" reaches interior organs. As a consequence, deeper pathology may be minimized or even averted. This interior organ pathology may be a direct result of the organism, or it may be an indirect result, manifested through antigen-antibody complexes or other immune system components. These components may inadvertently damage body tissues as "innocent bystanders", or may directly attack or invade tissues due to recognition problems (autoimmune diseases). The latter may happen because of similarity between organism structures and host tissues; often this involves the nucleoproteins (DNA or RNA), molecules that are important for controlling activity at a cellular level.

When a vaccine is administered, the organism is injected directly into body tissues, bypassing the local immune responses. When this happens, much of the immune system is rendered useless. The body then must compensate by increasing the activity of the balance of the system, and the defences begin in a compromised state, with the organism already in the blood stream. Within the blood stream, the primary aspects of the immune system are antibodies, proteins which attach to the organism and assist in its destruction. Although normally only a part of the defences, these antibodies become heavily responsible in a vaccine (injected) induced invasion, thereby initiating a hyperactive (increased) response. Additionally, the preparation of vaccines often breaks down the integral structure of the virus or bacteria, exposing internal strictures such as viral DNA or RNA (depending on the virus) to the immune system, leading to heavy antibody production against these nucleoproteins. Since nucleoproteins are relatively similar in all life forms, the host antibodies may lose the induced hyperactivity of antibody production. The result may be antibody mediated destruction of host tissue, and autoimmune disease. In a natural exposure, antibodies would be directed more at external structures, which are less similar to host tissues thus less likely to induce cross reactions. Incidentally, autoimmune diseases are occurring more frequently than ever; could this be a reason?

Aside from the above considerations, vaccines commonly contain materials other than the organism to which immunity is desired. These materials may be added as preservatives, adjuvants (materials to stimulate immune response, usually added to non-infectious [killed] vaccines), or antibiotics. Preservatives and adjuvants include such toxins and carcinogens as aluminum (alum), mercury (thimersol), and formaldehyde. Also, many foreign proteins are included if the organism was grown on foreign tissue such as chicken or duck embryos. Even more frightening, non-intended organisms are sometimes accidentally incorporated as contaminant "stowaways". In 1995 The Washington Post reported that MMR vaccine produced by Merck & Co. along with some influenza and yellow fever vaccines, contained an enzyme known as reverse transcriptase. This enzyme is associated with retroviruses such as FeLV, FIV, and HIV, and has the capability to alter genetic information, leading to serious diseases such as leukaemia and other cancers. These diseases may take years to manifest, so correlation with vaccination may be impossible, masking a potentially causative relationship.

The recommended schedules (age to vaccinate) are from Dr. Schultz, with a few changes as follows: He supports the use of combination vaccines and I strongly do not. He thus recommends in cats to combine Panleukopenia (FPL), Calicivrus (FC), and Rhinotracheitis (FVR) in one schedule; I have recommended to use FVR-FC intranasal vaccine only if needed, and separately from FPL. In dogs he would combine Distemper (CD), Parvo (CPV), and Hepatitis, and possibly Corona and Parainfluenza. I would recommend CD and CPV only, and not combined.

I generally support the use of killed (non-infectious) vaccines, as I feel they have less likelihood for long term damage, but Dr. Schultz presents a strong case for the use of modified live vaccines (MLV) as repetition can be necessary with non-infectious vaccines. With MLV, one dose can have high efficacy. This primarily applies to DC and CPV as non-infectious [killed] Rabies and FP are as effective as MLV. Dr. Schultz' one dose-95% (one dose of vaccine at a given age will successfully immunize 95% of animals) suggestions are as follows.

Canine Distemper (MLV) 10-12 weeks
Canine Parvovirus (MLV) 12-14 weeks
Feline Panleukoenia (non-inf. [killed] OK) 10-12 weeks

Finally, a comment about vaccinations and choice. While the concept of 'owning' an animal is one with which I am uncomfortable, I do recognize that this is how the human-animal relationship is $@%#*ed from a legal perspective. Otherwise we certainly can be said to be guardians of our companion animals. Within this framework the choice about vaccination rests with the human who has accepted responsible guardianship. It does not rest with the veterinarian. Another trend of the past few years is coercion of guardians into procedures such as vaccination. This coercion may be blatant, such as refusal to provide services, even emergency care, unless the animal is 'current' on vaccines. Sometimes even critically ill animals are vaccinated upon admission for treatment. More subtle means include induction of fear and/or guilt by asserting (as an authority figure) that companion animals are at risk if not vaccinated yearly, and that failure to comply is evidence of lack of caring. Tactics such as this can create feelings of guilt in the guardian, leading to a fear based decision to vaccinate an animal that is not at risk. This is unethical if not outright malpractice and refusal is an acceptable response. As has been stated above, rabies vaccination is legally compulsive at one to three year intervals, so refusal is a legal risk. Fighting to change these laws, however, is appropriate.

1 T.R. Phillips, T.R., DVM and Ron Schultz, PhD, Canine and Feline Vaccinations in Current Veterinary Therapy, Volume XI Robert Kirk, DVM and John Bonagura, DVM, eds., 1992.
2 Pitcarin, Richard, DVM, PhD, A New Look at the Vaccine Questions. Proceedings of the American Holistic Veterinary Medical Association, 1993.
3 Dodds, W. Jean, DVM, More Bumps on the Vaccine Road, Proceedings of the American Holistic Veterinary Medical Association, 1995.
4 Young, Arthur, DVM, Personal communication.
5 Blanco, B. Dee, DVM, Personal communication.
6 Hamilton, Don, DVM, Personal observation.
7 Schultz, Ronald D., PhD, American Holistic Veterinary Medical Association Annual Conference, 1995.
8 Day, Christopher, E.I., MRCVS Isopathic Prevention of Kennel Cough - Is Vaccination Justified? International Journal of Veterinary Homeopathy, Vol. 2, number 2, 1987.
9 Scheibner, Viera, PhD, Vaccination: The Medical Assault on the Immune System, Australian Print Group, Maryborough, Victoria, Australia, 1993, p. 21.
10 Dodds, 1995.
11 Ibid.
12 Scheibner 1993.
13 Coulter, Harris, PhD, Vaccination, Social Violence and Criminality, North Atlantic Books, 1990.

Copyright 1996 Don Hamilton, DVM

Please feel free to copy and disseminate this article, however it must be copied exactly (with no changes) unless written permission is obtained from the Dr. Hamilton.

Should You Really Be Giving Your Dog or Cat All Those Shots?
by Gene Franks

When Mary Phillips' dog Peanut died following a routine rabies shot, Mary, who lives in Liverpool, NY, started looking into the ailment listed by the veterinarian as the cause of death. Autoimmune hemolytic anaemia (AHA), she learned, causes the body to attack its own red blood cells. A Cornell University researcher attributed the condition to "chemical or toxic agents or immune-mediated destruction." Merck's Veterinary Manual more specifically states that "exposure to live parvo vaccine may be the initial cause in canines." The rabies vaccine box itself, which apparently no one ever reads, warns: "Tissue-origin vaccines contain extraneous protein in addition to rabies antigen that can lead to autoimmune disease." 

Mary's research led her to the realization that many veterinarians are very much aware that the vaccinations they routinely give can cause significant harm to animals. She found that there is even a name, vaccinosis, which is used to describe the chronic illness that results from vaccination. According to Dr. J. Compton Burnett, MD, "Vaccinosis is to be understood as the disturbance of the vital force by vaccination, that results in mental, emotional and physical changes that can, in some cases, be a permanent condition." 

Research into animal vaccines led Mary to an article in the May, 1995 issue of Wolf Clan magazine. Several veterinarians were asked by the magazine to comment on problems associated with routine animal vaccines. I think you'll be surprised at their candor. It is obvious that vaccines, the bread and butter of the veterinary practice, are held in low esteem by many in the profession. The following comments were excerpted by Mary Phillips from the Wolf Clan article and published in the Spring 1996 issue of The Civil Abolitionist. Here are some things the veterinarians and medical doctors had to say:

The first thing that must change with routine vaccinations is the myth that vaccines are not harmful.... Veterinarians and animal guardians have to come to realize that they are not protecting animals from disease by annual vaccinations, but in fact, are destroying the health and immune systems of these same animals they love and care for.
Dr. Charles E Loops, DVM, Pittsboro, NC. 

Injected vaccines bypass normal defences. They implant mutated micro-organisms, preservatives, foreign animal proteins and other compounds directly into the system. This is done in the name of preventing a few syndromes. If an animal is in an optimal state of health, he or she will produce the strongest immune response possible. This response offers protection against all natural challenges. The irony is that vaccine labels say they are to be given only to healthy animals. If they were truly healthy, they would not need them. Those who are not healthy are the most severely damaged.
Dr. Russell Swift, DVM. Ft Lauderdale FL.

Vaccinosis is the reaction from common inoculations (vaccines) against the body's immune system and general well being. These reactions might take months or years to show up and will cause undue harm to future generations.
Dr. Pedro Rivera, DVM, Sturtevant WI. 

In a general and frightening context, I see the overall health and longevity of animals deteriorating. The bodies of most animals have a tremendous capacity to detoxify poisons, but they do have a limit. I think we often exceed that limit and overwhelm the body's immune system function with toxins from vaccines. 

The most common problems I see that are directly related to vaccines on a day to day basis are ear or skin conditions, such as chronic discharges and itching. I also see behavior problems such as fearfulness or aggression. Often guardians will report that these begin shortly after vaccination, and are exacerbated with every vaccine.
Dr. Pat Bradley, DVM Conway AZ 

If an animal already has problems, those problems are contributed to by vaccines. So I don't want to give any more (shots).
Dr. Michael Lemmon, DVM, Renton WA. 

Routine vaccinations are probably the worst thing that we do for our animals. Repeating vaccinations on a yearly basis undermines the whole energetic well-being of our animals. Animals do not seem to be decimated by one or two vaccines when they are young, and veterinary immunologists tell us that viral vaccines need only be given once or twice in an animal's life. First, there is no need for annual vaccinations, and second, they definitely cause chronic disease.
Dr. Christina Chambreau, DVM, Sparks MD 

Unfortunately our society is in the grasp of a health panacea and this panacea is fuelled by the biomedical and pharmaceutical industries. Vaccinations have become the modern day equivalent of leeching. First of of all, introducing foreign material via subcutaneous or intramuscular injection is extremely upsetting to the body's defence system. In response to this violation, there have been increased autoimmune disease (allergies being one component), epilepsy, neoplasia (tumors), as well as behavioral problems in small animals. Even though man and animals have been around for thousands of years, interestingly, the increase in cancer, respiratory disorders (most air quality standards are higher today than in decades past.), and autoimmune problems have likewise escalated alarmingly during the previous decade. Vaccines are not the only culprit for these increases; however, I feel they are one of the primary offenders.
Dr. Mike Kohn, DVM, Madison Wl 

Vaccines are not always effective, safety is unproven, and long term consequences are unknown. Despite this, the government requires their use, resulting in a lack of incentives for drug companies to produce better products. Additionally, mandatory vaccine laws make it impossible to conduct properly controlled studies, so we'll never know if vaccines are truly safe, as is claimed by the government and medical profession. Similar to other procedures, the right of informed consent, i.e. the right to say 'NO', should apply to vaccines.
Dr. Kristine Severyn, RPH, Ph.D., Director Ohio Parents for Vaccine Safety .

I believe that vaccinations, especially the rabies vaccines, are contributing to a lot of the "allergic" skin problems seen today, leading to a problem known as vaccinosis, which is characterized by itchy, dark, thickened skin; especially over the abdomen and under the legs. It is seen in both dogs and cats, but is more obvious in the dog.
Dr. Ana Maria Scholey, Holistic Veterinarian.

I think we eventually have to take a look at what is happening to animals because of repeated vaccinations. If you have an animal that within 10 days from the time he received vaccines falls back into a condition that you'd been trying to clean up for some time, you know what happened. We're seeing a condition that is being described by some of my colleagues and myself as vaccinosis. We have to recognize it as being there.
Dr. Norman C. Ralston, DVM, Mesquite, TX.

The idea of annual vaccines is really questionable. There is no scientific basis from what I've been able to read. There was a good article in Current Veterinary Therapy a couple of years ago. They did a literature search and the two authors were not 'alternative' veterinarians, and they could find no scientific basis for annual vaccines. So it's just being done; there is no real basis for the practice. There are a lot of chronic conditions that develop some time after vaccinating. Some of these conditions that I see are chronic ear infections, digestive problems, seizures, skin problems, and behavioral problems.
Stephen R Blake, DVM, San Diego, CA.

Every time a dog is vaccinated for parvo, the number of white blood cells in the circulation decreases for a while. This means their immune system won't work as well during that time. Every veterinarian who has been in practice long enough has seen reactions to vaccines, ranging from lethargy, mild fever, sore neck, to vomiting and sleeping for 24 hours, to total collapse and shock. In cats we now recognize that this in time can cause fibrosarcoma, a nasty cancer. This is officially recognized by the veterinary community, and if this isn't a form of vaccinosis, I don't know what is.

Dr. Nancy Scanlan, DVM, Chino Hills CA

Article extract from Purewater Gazette

It is reasonably certain at this time that distemper and parvovirus vaccinations have a duration of effect of at least three years and probably closer to five years, with the probability that at least some dogs have lifelong immunity after the initial vaccination series and the one year booster. The adenovirus portion of the vaccine is also reported to have a long duration of immunity and I am not certain about parainfluenza but I also do not consider this to be a very important virus to protect against. So, at the present time we are in the process of deciding what vaccine interval we will use for dogs over the next few years. 

I do not see much value in running titers to assess the immune system status against the various viral illnesses which there are vaccines for. High titers are not necessarily a sure sign of protection and low, or even absent titers, do not mean that there is not protection remaining due to the presence of active memory cells still programmed to recognize the virus the vaccine is supposed to protect against. The best test to determine immunity is a virus challenge but nobody in their right mind wants to use this standard to determine the protection for their individual pet. 

So at present, I think that the best approach is to use a reasonable time interval between vaccinations based on available information on duration of immunity. We will probably go to three year intervals in our practice, as a reasonable compromise between yearly vaccinations, which do not seem necessary, and taking the risk of loss of protection as a patient approaches the average time that protection is known to decrease. 

I do think that it is important to continue to have yearly physical examinations because pets do not communicate illness well, in many instances, and because things like ear infections, dental problems, cataracts, etc. are hard for many owners to detect but are detectable by someone who knows what to look for. 

Mike Richards, DVM
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As the American Veterinary Medical Association states: "Veterinarians must
promote the value of the exam and move away from their dependence on vaccine income." 

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