Nineteen senators have written a letter to U.S. agriculture and trade officials asking that they put pressure on China to accept imports of U.S. pork, according to Prairie Business magazine.

“[P]ork producers across the nation should not continue to be unfairly denied access to Chinese markets,” wrote Sen. Amy Klobuchar, D-Minn, in the letter to Agriculture Secretary Tom Vilsack and Trade Representative Ron Kirk. “I will continue to push the administration to hold China accountable for its commitments and to expand opportunities for U.S. exports overseas.”

China said in October 2009 that it would reopen its borders to U.S. pork products after months of refusing the imports, citing concerns over the H1N1 influenza virus—even though it is widely held that humans do not contract the virus from consuming pork. Despite its promise, China has not resumed U.S. pork imports.