FILE: In this December 18, 2009, file photo, South Korean trucks transporting the Influenza medicine Tamiflu and Relenza get ready to leave for North Korean city of Kaesong as South Korean Army soldiers stand at customs, immigration and quarantine office in Paju, near the border village of the Panmunjom (DMZ) that separates the two Koreas since the Korean War, South Korea.South Korea is scrambling to prevent the spread of the highly contagious African swine fever on its pig herds after North Korea confirmed an outbreak at a farm near its border with China. Photo: AP/file