Cat Vaccination Schedule

Feline Immunology, Maternal Antibody Interference, and Non-Adjuvanted Vaccine Safety

Feline vaccinology is governed by standardized clinical protocols designed to protect against lethal viral pathogens while minimizing the risk of Feline Injection-Site Sarcoma (FISS). Under international guidelines established by the American Association of Feline Practitioners (AAFP) Feline Vaccination Advisory Panel and the World Small Animal Veterinary Association (WSAVA), vaccines are classified into Core (mandatory for all cats) and Non-Core (lifestyle/risk-dependent).

AAFP Feline Vaccination Roadmap:
1. Core Vaccines (Mandatory for ALL Cats):
   - FVRCP (Feline Viral Rhinotracheitis [FHV-1], Calicivirus [FCV], Panleukopenia [FPV]):
     Initial series every 3–4 weeks starting at 6–8 weeks until 16–20 weeks of age; boosted at 1 year, then every 3 years
   - Rabies: Required by law; administered at 12–16 weeks; boosted at 1 year, then annually or every 3 years (formulation dependent)
2. Non-Core / Lifestyle Vaccines:
   - FeLV (Feline Leukemia Virus): Mandatory for all kittens under 1 year and all outdoor/multi-cat contact cats; series of 2 shots, then annual boosters
Injection Site Safety Protocol: Administer distal limb injections (FVRCP right front, FeLV left hind, Rabies right hind) to allow surgical margins

Feline Panleukopenia ("Feline Distemper") Lethality

Feline Panleukopenia (FPV) is an extremely contagious parvovirus that destroys rapidly dividing bone marrow and intestinal crypt cells:

• It causes severe vomiting, bloody diarrhea, and total white blood cell collapse (panleukopenia), with mortality rates exceeding 90% in unvaccinated kittens.
• FPV survives in the environment on shoes, clothing, and carpets for over a full year, making vaccination vital even for strict indoor-only cats.

The Non-Adjuvanted Vaccine Standard

To prevent chronic inflammatory granulomas that trigger Feline Injection-Site Sarcomas (malignant fibrosarcomas), modern feline medicine prioritizes non-adjuvanted modified-live or recombinant canarypox-vectored vaccines (such as PureVax).

Track preventative milestones with Cat Care Planner, calculate lifetime veterinary costs via Cat Cost Calculator, manage multi-cat health using Cat Compatibility Test, and review feline vaccine guidelines at AAFP.