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What are the symptoms of porcine reproductive and respiratory syndrome?
Porcine reproductive and respiratory syndrome was once called mysterious swine disease, new swine disease, etc. In China, this disease is classified as a Class II infectious disease. If this disease is not effectively controlled in the early stage, it can easily cause large-scale infection. Therefore, many farmers pay great attention to porcine reproductive and respiratory syndrome. So what are the manifestations of porcine reproductive and respiratory syndrome