When attempting to stereotype such a controversial subject as that of vaccination programs for the dog and cat, one soon finds that there are about as many ideas on the subject as there are practicing veterinarians. However, I do believe that at least the basic concepts of the antigen-antibody reaction can be accepted by all.
Jensen, Elroy C.
"Immunization Programs for Dogs and Cats,"
Iowa State University Veterinarian: Vol. 29
, Article 2.
Available at: https://lib.dr.iastate.edu/iowastate_veterinarian/vol29/iss2/2