The outbreak of a new flu strain—a nasty mash-up of swine, avian, and human viruses—has infected 1000 people in Mexico and the U.S., killing 68. The World Health Organization warned Saturday that the outbreak could reach global pandemic levels. Is Smithfield Foods, the world’s largest pork packer and hog producer, linked to the outbreak? Smithfield operates massive hog-raising operations Perote, Mexico, in the state of Vera Cruz, where the outbreak originated. The operations, grouped under a Smithfield subsidiary called Granjas Carrol, raise 950,000 hogs per year, according to the company Web site—a level nearly equal to Smithfield’s total U.S. hog...