Mutant bird flu strain hits China, Vietnam, UN warns
The UN says bird flu is showing signs of returning, and a new strain of H5N1 avian influenza found in Asia can apparently sidestep existing vaccines.
News DeskAugust 29, 2011 12:22
Staff wearing protective clothing cull chickens in a Sham Shui Po market after the deadly H5N1 bird flu virus was found in samples collected from the market's…
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