Concern Grows Over Possible Swine Flu Pandemic

MEXICO CITY — A strain of flu never seen before has killed as many as 61 people in Mexico and has spread into the United States, where eight people have been infected but recovered, health officials said Friday.

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Mexico's government said at least 16 people have died of the disease in central Mexico and that it may also have been responsible for 45 other deaths. The World Health Organization said tests showed the virus in 12 of the Mexican patients had the same genetic structure as a new strain of swine flu, designated H1N1, seen in eight people in California and Texas. More...