The Changchun Epidemic Control Center is conducting an evaluation of the immunization effects of all counties and districts in the city to prevent and control major animal diseases. They have collected sampling from five counties and plan to expand to other areas. The samples will be tested for foot-and-mouth disease, swine fever, and other key diseases. Based on the results, timely measures will be taken for animal groups that do not meet the required immunity. The center is also conducting pathogenic detection of bovine nodular skin disease to strengthen the prevention and control of key animal diseases.