The most commonly used adjuvant in animal immunization is

Fergus adjuvant. Freund's adjuvant enhances the immunization effect of vaccines and improves the animal's immune response to the vaccine. It can promote the uptake and presentation of antigens, enhance the activation and proliferation of T cells and B cells, thus improving the immunogenicity of the vaccine, and Fuchs adjuvant is more stable, can maintain its activity and stability in different temperatures and environmental conditions.