Chinese scientists have recently published their findings on bird flu study in a latest issue of the journal Science. The report cited an event that saw H5N1, a highly pathogenic strain of bird flu, attacking migrant birds in the first half of the year at the Qinghai Lake, the first instance causing massive death of migrant birds by the virus. Through an analysis and study of the sequenced virus, researchers reached a preliminary conclusion that the attack could mark a recurrence of the combination of a number of virus strains, or it could be the first time discovery by scientists though the virus may have already existed in nature. Further studies also show that the H5N1 strain has an enhanced capacity to cause birds ill, compared with similar flu viruses found in domestic birds. The findings remind people of raising their alert against the migrant birds flu viruses, in addition to its public health significance. The occurrence of the migrant birds flu over an extended area indicates that such epidemic is no longer a regional or national issue, but rather a common issue facing the global community, though the original source of the viruses remains undetermined.