TY - CPAPER AU - L. Willems TI - Beneficial impact of a PRRSV vaccination program combining a modified live vaccine and PROGRESSIS® on virus circulation and technical performance 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 - 2016 DA - 2016/06/07 L1 - https://www.aasv.org/library/swineinfo/Content/IPVS/2016/Poster/538_PO-PW1-147.pdf SE - Virology & Viral Diseases ER -