A time period in the life of a young animal in which the maternal antibodies are too low to provide protection against a certain disease but too high to allow a vaccine to work and produce immunity. Recommendations for Feline Leukemia Virus Testing. The Compendium on Continuing Education for the Practicing Veterinarian. Vaccine-associated feline sarcoma symposium. Inc. July 25, 1998.
Researchers suspect genetic cause for vaccine site sarcomas.
Cole, R. Rethinking canine vaccinations. Immunoprophylaxis and immunotherapy. Jarrett, O. Development of vaccines against feline leukemia virus. Pfizer Animal Health. Duration of immunity in companion animals after natural infection and vaccination.