TY - CPAPER AU - Polson, D, Yeske, P, Holtkamp, D, Philips, R TI - USE OF A RISK ASSESSMENT SCORING TOOL TO EVALUATE PRRS-NAIVE STATUS SURVIVAL IN SWINE BREEDING HERDS T2 - International Pig Veterinary Society Congress DP - American Association of Swine Veterinarians DB - AASV Swine Information Library UR - https://www.aasv.org/library/swineinfo/ PY - 2006 DA - 2006/06/01 L1 - https://www.aasv.org/library/swineinfo/Content/IPVS/2006/VIRAL/O_04-01.pdf SE - Major viral infections: PRRSV transmission ER -