separate strains of swine influenza. The origins of this new strain are unknown, and the World Organization for Animal Health (OIE) reports that this strain has not been isolated in swine.[3] It passes with apparent ease from human to human, an ability attributed to an as-yet unidentified mutation.[4] The strain in most cases causes only mild symptoms and the infected person makes a full recovery without requiring medical attention and without the use of antiviral medicines.[5] en.wikipedia.org ...