Foundations of Area and Regional PRRS Virus Control, Utilization of
PADRAP to Assess Risk of Exposure in Area and Regional Control Projects, by Dr. Derald Holtkamp. From the
Boehringer Ingelheim Vetmedica, Inc. Swine Health Conference held December 7th, 2008 during the 2008 International PRRS Symposium, Chicago, IL, USA.
