This video explains WHY the risk posed by "Swine Flu" (A9 H1N1) is being classified as "mild" Please Rate, Favorite and Share. "Swine Flu" (A9 H1N1) is a hybrid of the following influenza strains: * North American Swine (Pig) * North American Avian (Bird) * European/Asian Swine (Pig) * Human Influenza The new virus 'attacks' the upper respiratory tract (your throat) which makes it much less dangerous than it would be if it entered the lungs. A gene named NS1 is also described as 'normal' which ...