A new strain of vaccine-resistant H5N1 bird flu virus has emerged in China and is spreading through southeast Asia, Hong Kong researchers report.
"The implications are that current control measures are ineffective with dealing with the evolutionary changes that H5N1 undergoes," warned Dr. Yi Guan, director of the State Key Laboratory of Emerging Diseases at the University of Hong Kong and lead author of a report in this week's issue of the Proceedings of the National Academy of Sciences.
The new strain has become dominant throughout the region, replacing other variants of the virus, the report said.
(NewsTarget) While the deadly H5N1 strain of the bird flu has not yet mutated into a form easily transmittable between humans, a Harvard School of Public Health poll conducted Thursday suggests that many Americans would be left without anyone to care for them if it did.