H1N1 influenza adopted novel strategy to move from birds to humans

Berkley researches in california say that the the H1N1 virus has shown a new mutation in one of its genes that has been seen in any of the previous samples. A gene that it closely related to the spanish infulenza of 1918. The 2009 swine flue virus retain the bird version of polymerase, but has a second mutation that seems to surpess the the abiltly of human cells to prevent the bird polymerase from working.