What is the purpose of a toxoid?

The purpose of a toxoid is to stimulate immunity to a toxin. Toxoids are inactivated toxins that can no longer cause disease but still elicit an immune response in the body. This process helps produce antibodies against the toxin, resulting in future protection if the body is exposed to the active form of the toxin. By using a toxoid in vaccination, animals can build up immunity without the risk of developing the associated disease, allowing for a safer approach to protection against certain infections, particularly those caused by bacteria that produce toxins.

Other options may involve other aspects of veterinary pharmacology or immunology; however, they do not directly relate to the specific mechanism or purpose of a toxoid in stimulating an immune response to toxins.