Bird flu: 'Strong evidence' suggests virus has passed from mammals to humans for first time

[admin]

Scientists fear bird flu has spread from mammals to humans for the first time, marking another step in the evolution of the deadly virus. New analysis concludes there is "strong evidence" that a Texas farm worker who tested positive for the H5N1 virus caught it from sick dairy cattle. There is growing concern about the failure of American authorities to contain the spread of the virus.