PCV2 Lowers Vaccine Efficacy In 2006, Iowa State University scientists Dr T Opriessnig and Dr. PG Halbur demonstrated experimentally that subclinical PCV2-infection is associated with decreased vaccine efficacy, write JoAnn Alumbaugh at Farms.Com. 23 January 2008 2 minute read North America Our Partners Lallemand Lanxess Hamlet Protein Thermo Fisher Scientific Axcentive More News View all Malaysia continues as strong market for US pork - USMEF Markets Imports and Exports 26 April 2024 1 minute read US pork exports to Australia more than triple over last year - USMEF Markets Imports and Exports 26 April 2024 1 minute read January-February shipments climb 232% US hogs markets ease on technical trade - CME Market Trends Markets and economics 26 April 2024 2 minute read Cattle futures turn higher Our Partners Lallemand Lanxess Hamlet Protein Thermo Fisher Scientific Axcentive