The Associated Press
ROME — The United Nations has warned of a possible resurgence of the deadly avian influenza virus, saying wild bird migrations had brought it back to previously virus-free countries and that a mutant strain was spreading in Asia.
A mutant strain of H5N1, which can apparently sidestep defenses of existing vaccines, is spreading in China and Vietnam, the U.N. Food and Agriculture Organization said in a statement Aug. 29. It urged greater surveillance to ensure that any outbreaks are contained.
The World Health Organization recently reported that a 6-year-old Cambodian girl had died Aug. . .
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