Bird flu in humans mutating

From Breitbart.com: The deadly H5N1 strain of bird flu seen in human cases in China has mutated as compared with strains found in human cases in Vietnam. Whilst, thankfully, still not capable of human to human transmission, the virus has mutated "to a certain degree" according to a spokesman for the health ministry. China has confirmed its first three human cases of Bird flu in the last month, two of which were fatal.