Livestock and poultry infectious diseases are mainly caused by the invasion of pathogenic microorganisms (bacteria, viruses, etc.) from the external environment into the body of livestock and poultry, growth and reproduction in the body, and the diseases caused by the normal physiological functions of livestock and poultry. In order to prevent livestock and poultry infectious diseases, vaccines, bacterin toxins, and other biological products for prevention are commonly used to immunize livestock and poultry in potential areas or threatened areas of certain infectious diseases to stimulate specific resistance of livestock and poultry. That is to stimulate the body of livestock and poultry to produce a kind of globular substance called "antibody". The antibody globulin is present in the animal's blood or other tissues and can bind specifically to the same pathogenic microorganisms, causing the pathogenic microorganisms to lose their pathogenic effects. However, the production of antibodies must go through a process; animals that have just been injected with vaccines, bacterin-like toxins and other biological products cannot immediately resist the infection of pathogenic microorganisms. In general, a live bacterial vaccine takes one week, and a deadly vaccine requires two to three In a week, enough antibodies can be produced in animals. After a longer period of time, the antibodies in the animal can be maintained at levels sufficient to resist infection. This term is called immunity period. Animals are resistant during the immunization period and will not be infected. The length of the immunization period varies depending on the type of vaccine. Exceeding the immunization period, the amount of antibodies in animals gradually decreases, and animals cannot continue to be infected. Therefore, immunization must be performed again to enable animals to regenerate antibodies and resist infectious diseases. The use of anti-blood cleanup as a treatment can be used for emergency prevention in areas where epidemics have already occurred or the threat of infection. Because the antiserum itself contains a large amount of antibodies, after the serum is injected into the animal, the antibody can gain the ability to resist infectious diseases as it enters the body. However, this ability can be maintained for a short period of time. If the animal is injected with antiserum for a week or two, a longer immunization period can be obtained by re-injecting the vaccine.