This product is used to prevent transmissible gastroenteritis and porcine epidemic diarrhea. It is mainly used for inoculating pregnant sows to make their piglets get passive immunity, and also used for active immunity to protect pigs of different ages. After 14 days of active immunization, the immunization period is 6 months. The immune period of passive immunization in piglets is from lactation to 7 days after weaning.