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Efficacy of an attenuated European subtype 1 porcine reproductive and respiratory syndrome virus (PRRSV) vaccine in pigs upon challenge with the East European subtype 3 PRRSV strain Lena

VaccinationPrrsv Strain LenaEast EuropeanVeterinary VaccineVaccine DevelopmentImmunologyVeterinary SciencePathologyVirologyPorcine ReproductivePorcine DiseaseSwine VirusMedicineAnimal Virus