June 4, 2009
By Donald G. McNeil Jr.
Six years of worrying about bird flu did much to prepare the United States for the current swine flu outbreak, federal officials and an independent monitoring group said Thursday, but they cautioned that there were still gaps in planning.
After the H5N1 avian flu emerged widely in Asia in 2003, killing about 60 percent of those infected by it, many countries took steps to head off the crisis that would emerge if that virus were to acquire the ability to jump easily from human to human. It has not, but a number of the measures were helpful.
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