The World Health Organization (WHO) said it was "deeply concerned" about research into whether the H5N1 flu virus could be made more transmissible between humans after mutant strains were produced in labs.
Dec 31, 2011
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World health ministers said Friday they were being vigilant after a Dutch laboratory developed a mutant version of the deadly bird flu virus that is for the first time contagious among humans.
Dec 9, 2011
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A mutant strain of the deadly bird flu H5N1 virus detected in Vietnam does not appear to pose an increased risk to human health, the United Nations said on Monday.
Sep 5, 2011
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The UN Food and Agriculture Organisation (FAO) on Monday warned about a new mutant strain of the deadly bird flu H5N1 virus in China and Vietnam, saying there could be a "major resurgence" of the disease.
Aug 29, 2011
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