In China, PRRS is the most serious disease that impairs the pig raising & breeding industry. It inflicted heavy losses on China pig raising & breeding industry for many times. In April 2007, Ministry of Agriculture of China issued Technical Standards of Highly Pathogenic Porcine Reproductive and Respiratory Syndrome Prevention and Treatment, and classified HP-PRRS into serious animal epidemic diseases which are covered by the national compulsory immunization program. Based on National Compulsory Immunization Plan of Animal Epidemic Diseases 2013, China government conducts compulsory vaccinations for all pigs against HP-PRRS. In order to identify various strains, local governments must take …
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