In order to make sure your cat is FCoV-free, an antibody blood test could be performed indicating exposure or infection. When screening cats for coronavirus antibodies, it is important to use a highly sensitive test kit that can detect all positive cats, not missing any. 

Due to its performance of 100% sensitivity (with a negative result indicating an FCoV/FIP-free cat), Biogal’s ImmunoComb Feline Coronavirus FCoV (FIP) Antibody Test Kit is highly recommended by Dr. Diane Addie in her published study comparing a variety of FCoV antibody tests.