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NADC30-like PRRSV has been recently reported and became endemic in vaccinated pig herds in China. The outbreaks of disease in vaccinated pigs indicated the inefficacy of commercial PRRSV vaccines. In this study, five commercial PRRSV vaccines that have been widely used in China were used to evaluate the efficacy to a NADC30-like PRRSV infection. The vaccinated pigs were challenged with HNjz15, a NADC30-like...
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