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 Mexico leads the way for US pork exports - USMEF Markets Imports and Exports Market Trends 18 April 2024 1 minute read EU wheat edges lower following Chicago as low export demand weighs Market Trends Feed markets 17 April 2024 2 minute read Black Sea competition weigh on contracts Brazil pork exports down 14% in March - ABPA Markets Imports and Exports Market Trends 17 April 2024 2 minute read Pork exports totalled 91.9 thousand tons Our Partners Lallemand Lanxess Hamlet Protein Thermo Fisher Scientific Axcentive