Photo: Zhang et al./Science Some...  ...ce Some strains of the flu virus, like the H5N1 bird flu virus, are highly lethal but a...  ...new virus: They combined H5N1 avian influenza, which is highly lethal but doesn...  ...provide clues of what to look for in circulating *...

While everyone was talking about the swine flu, re...  ...thank:All and all, 248 humans have died from the H5N1 according to WHO data as of January 2009. H5N1 , as a strain, infects more species than any previ...  ...e results. So they tried the deadly virus itself, H5N1 isolat...