With the development of immunology, biochemistry, molecular biology, molecular genetics and other disciplines, the research on vaccines for livestock and poultry is changing with each passing day, there are more and more species, the technical level is getting higher and higher, and the scope of application is getting wider. So how to apply livestock vaccines to better control infectious diseases of livestock and poultry and to protect the development of the breeding industry? The spleen vaccine is administered intramuscularly or subcutaneously. When using, use the bottle label to indicate that the first portion is diluted with sterile normal saline at 1 ml per head, and the size pigs are 1 ml. Stored in the dark below -15 ℃, the validity period is 12 months. After dilution of the vaccine, it should be stored in a refrigerated container. Freezing is strictly prohibited. If the temperature is below 15 ° C, it should be used up within 6 hours. If the temperature is 15 ~ 27 ℃, it should be used up within 3 hours. The time of injection is preferably 2 hours after eating or before eating.