Over Vaccination
Understanding how vaccines work and when they are truly necessary is critical to your cat's long-term health. Vaccines elicit antibody production that remains lifelong in most cases, yet the common practice of annual boosters can do more harm than good.
Core Vaccines
There are two core vaccines recommended for cats:
- FVRCP (Feline Viral Rhinotracheitis, Calicivirus, Panleukopenia)
- Rabies
These core vaccines are essential, but over-boosting is harmful. Once a cat has developed antibodies from the initial vaccine series, those antibodies typically remain for life.
Risks of Over-Vaccination
Major risks of unnecessary vaccine boosters include:
- Autoimmune reactions: The immune system can turn against the body's own tissues.
- Feline Chronic Renal Failure (CRF): One of the leading causes of death in cats has been linked to repeated vaccination.
- Vaccine-Associated Sarcomas (VAS): Aggressive cancerous tumors that can develop at injection sites.
Best Practices
Modern veterinary immunology recommends titer testing (antibody testing) instead of automatic annual boosters. A titer test measures the level of antibodies in your cat's blood and can determine whether revaccination is truly necessary.
Recommended Vaccination Schedule
- FVRCP at 10–12 weeks
- FVRCP booster at 14–16 weeks
- Rabies at 16 weeks
- Rabies booster 1 year later
- Titer testing afterward to determine if additional boosters are needed
We encourage all cat owners to discuss vaccination protocols with their veterinarian and to consider titer testing as a safe, science-based alternative to routine annual boosters. Your cat's immune system deserves thoughtful, informed care.