Vaccination is the most important preventive health intervention for cats, but occasional adverse reactions require monitoring and reporting to maintain both individual welfare and vaccine safety standards.
Vaccination saves far more lives than it risks through adverse reactions, but individual welfare requires monitoring after vaccination and prompt reporting of suspected reactions. The rare but serious injection site sarcoma is associated with certain adjuvanted vaccines, and breed and individual risk factors influence the welfare calculation. Working with a veterinarian to develop an appropriate vaccination protocol for each individual cat balances protection with risk.