The production of PRRS negative pigs from multiple PRRS serologically stable herds over time using segregated early weaning (SEW) A. M. Rajic, C. E. Dewey, A. E. Deckert, R. M. Friendship, S. W. Martin and D. YooVet. Res., 31 1 (2000) 95-96DOI: https://doi.org/10.1051/vetres:2000044