Personally, I do give my dogs all of the core canine vaccinations -- rabies as required by law, and distemper, parvo, and hepatitis once separately after the age of 16 weeks and then titer to make sure there was an immunological response.
It is essential for dog owners to be aware of the significant adverse side affects associated with vaccination. Redundantly vaccinating dogs against distemper, parvo, and hepatitis, which all have scientifically proven minimum durations of immunity of 7 years
according to the World Small Animal Veterinary Association's 2007 Vaccine Guidelines
and the 2003 and 2006 American Animal Hospital Association's Canine Vaccine Guidelines
unnecessarily increases the likelhood of them suffering an adverse reaction. (accessible via links below)
Oon Page 18 of the 2003 AAHA Guidelines, they state that: “We now know that booster injections are of no value in dogs already immune, and immunity from distemper infection and vaccination lasts for a minimum of 7 years based on challenge studies and up to 15 years (a lifetime) based on antibody titer.”
According to the World Small Animal Veterinary Assocation's 2007 Vaccine Guidelines, "DOI after vaccination with MLV vaccines is 7 years or longer based on challenge and serological studies."
(DOI is duration of immunity, MLV is modified live virus -- distemper, hepatitis, and parvo are all MLV vaccines)
Time and time again people tell me that their veterinarians are giving their dogs annual and triennial distemper, hepatitis, and parvo boosters without having run titers to determine if their counts are inadequate. Giving redundant boosters does not enhance immunity
-- if a dog is considered immune with a titer count of 1:300, giving unnecessary boosters does not increase its immunity; however, it does increase its risk of adverse side affects from the vaccine.
It's impossible to know just how often dogs adversely react to vaccination because veterinarians are not required by law to do so, and according to the World Small Animal Veterinary Association's 2007 Vaccine Guidleines, "The VGG recognises that there is gross under-reporting of vaccine-associated adverse events which impedes knowledge of the ongoing safety of these products.
The recently released World Small Animal Veterinary Association 2007 Vaccine Guidelines
are available online at - WSAVA - Scientific Advisory Committee
Scroll down to Vaccine Guidelines 2007 (PDF) Duration of Immunity to Canine Vaccines: What We Know and Don't Know
, Dr. Ronald Schultz Duration of Immunity World Small Animal Veterinary Association 2007 Vaccine Guidelines - WSAVA - Scientific Advisory Committee
Scroll down to Vaccine Guidelines 2007 (PDF)
The 2003 American Animal Hospital Association's Canine Vaccine Guidelines
are accessible online at Special Report
The 2006 American Animal Hospital Association's Canine Vaccine Guidelines
are downloadable in PDF format at About AAHA
Veterinarian, Dr. Robert Rogers,has an excellent presentation on veterinary vaccines at Home