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Porcine reproductive and respiratory disease virus: Evolution and recombination yields distinct ORF5 RFLP 1-7-4 viruses with individual pathogenicity

Viral EvolutionMedicineGeneticsPathogenesisVirologyPorcine ReproductivePorcine DiseaseSwine VirusVirus PhylogenyRespiratory Disease VirusIndividual PathogenicityAnimal Virus