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Drug-resistant “dual mutant” flu strains now being tracked in U.S., CDC says
At least two human cases of the new so-called “dual mutant” strains of H1N1 influenza have been detected in U.S. patients, the Centers for Disease Control and Prevention said Wednesday, with genetic changes that could cut the effectiveness of the main flu antiviral that hospitals rely on. An analysis of the new H1N1 flu viruses…