It is a fact that in the USA today, literally hundreds and perhaps thousands of vaccinated dogs and cats are still contracting the diseases they were vaccinated against.
Parvovirus is a serious case in point.
Unfortunately, for some reason the vaccine did not stimulate the immune system enough to protect the puppy from disease. The reason may be interfering maternal antibodies , the vaccines themselves, the dog's own immune system, or genetics. By far the most common reason in puppies is interfering maternal antibodies. For more information on vaccines and vaccinations, see Vaccines, Vaccination and the Immune System of Dogs and Cats . Inc. All rights reserved.