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Absytract The highly pathogenic porcine reproductive and respiratory virus (hpPRRSV) with discontinuous 30 amino acid (aa) deletion as a gene marker has caused great economic loss in pig industry and since 2007 has become the dominant strain prevalent in China and Vietnam since 2007. Reverse genetics method is a powerful tool urgently needed to be used on the hpPRRSV to study the intriguing molecular...
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