U.S. Agriculture Secretary Tom Vilsack has urged the media not to refer to the novel H1N1flu as “swine” flu and to use the correct nomenclature — H1N1. "It is fundamentally different [from swine flu], it's unique, we've never seen it before," he said. Using the wrong name for the virus affects the market, especially the pork producers, adversely, Vilsack said.

World Health Organization has named the virus "Influenza A," and the World Organization for Animal Health said it never should have been named "swine" flu.

National Pork Producers Council President Don Butler said, "With the fall flu season weeks away, it is imperative to the livelihoods of America's 67,000 pork producers that the novel H1N1 influenza be referred by its proper name."