The Rabies Titer Test or RFFIT is used to monitor rabies antibody levels in someone who may have an occupational risk of rabies, such as veterinarians or rabies lab workers, or someone who has been exposed to rabies and needs to be monitored to ensure that the vaccination is effective. Usually, testing is not necessary if the standard protocol is followed for the rabies vaccination after an animal bite.

The Rabies Antibody Titer is an estimation of a person’s immune response against the rabies virus. Survival after exposure to and infection with the rabies virus is more likely to occur the higher the titer level at the time of infection.