In manufacturing veterinary vaccines, overall control is essential to ensure that consumers receive vaccines of high quality. Haphazard operations in the manufacture of substances that may be necessary to save lives or to restore or preserve health cannot be permitted. The quality of veterinary vaccines depends on the starting materials, manufacturing process, building, equipment and personnel involved. All veterinary vaccines should be manufactured under carefully controlled and monitored conditions, and sole reliance should be placed on any tests for assurance of the quality of the finished product.