U.S. Pigs Seen by OIE Building Resistance to Virus by Year End

U.S. losses from the porcine epidemic diarrhea virus that’s killed millions of pigs may wane by the end of the year as surviving sows pass on resistance to their piglets, the World Organisation for Animal Health said.

U.S. pigs’ initial lack of natural immunity to the virus explains the extent of the losses, according to Brian Evans, deputy director general of the Paris-based intergovernmental animal-health group, known by its French acronym OIE.