In most properly vaccinated dogs, the immunity should last more than a year, and often several years. However, immunity does decline with time and this decline rate varies with individuals. To maintain the best immunity in a reasonable way, revaccinations have proven very successful. Because the vaccines we use are continuously improving, some do not need to be given as often, depending on individual circumstances. Most dogs with low-risk lifestyles can be vaccinated every three years with the "core" vaccines and as needed for any "non-core" vaccines (most non-core vaccines require annual boosters). Your veterinarian will discuss the need and frequency of booster vaccinations for your dog based on your pet's needs and lifestyle.
Oct 20, 2015 - Some dogs do not need every vaccine
Rabies - Rabies is among the most serious of canine diseases. It's dangerous to the population and deadly in dogs. Because of the real danger that rabies poses, rabies vaccinations are required by law in Maryland. Your dog will need one vaccine while it's a puppy, another a year later, and a booster shot every three years for the rest of its life.
This decision is between you and your veterinarian
When you think of rabies, you may think of wild animals such as opossums or raccoons; however domestic pets are just as susceptible to rabies as any other animal. Most state laws require that all dogs and cats be vaccinated for rabies. Rabies shots should be administered in the first year of your puppy's life, and then every 3 years thereafter. If you are traveling with your pet across state or international lines, you may need proof that your dog has an up-to-date rabies vaccination.
Are Annual Pet Vaccines Necessary? | Prevention
Your adult dog may not need annual vaccinations and can instead have — tests that check a dog’s immunity levels — to determine exactly which vaccinations are needed. One exception is the rabies vaccine, which is regulated by law and may be required every one to three years, depending on where you live and the type of rabies vaccine the vet uses.Although I am sure you need to vaccinate your puppies, are annual vaccinations for your adult dog even necessary? Probably not, and since all vaccinations have potential side effects (like allergic reactions and immune-mediated hemolytic anemia) you need to ask yourself if your friend is in more danger from the vaccine or the disease. The best way to decide whether or not to get vaccine boosters is to check the levels of antibody in the dog´s serum but it is expensive and may not even provide an accurate picture. (There are cells in the body that can become active when stimulated by the virus and become active in producing antibodies.) If you do not take your dog to a groomer or boarder that requires vaccinations every year you can get by testing every three or four years, and then vaccinate only is she needs it. If your veterinarian tells you he wants you to vaccinate every year (like with the “wellness plan” where the costs of the vaccines are covered but serum titer levels are not) it is up to you to protect the health of your dog by refusing the boosters.