Wisconsin state veterinarian Paul McGraw is part of a federal task force created to help stop porcine epidemic diarrhea virus' spread through the U.S. In this Q&A, Dr. McGraw explains the government's plan to combat the disease and what is known about the recently approved PEDv vaccine. Dr. McGraw says challenges remain, including identifying how the virus entered the U.S. and breached a tightly controlled industry and understanding exactly how it is spread.

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