CDC: Flu vaccine should be more effective this year
The influenza strain that caused the most illness last year, H3N2, emerged too late in the season to be included in North American vaccines. This year, however, the flu vaccine is expected to be effective against it based on research by the U.S. Centers for Disease Control and Prevention. While the vaccine will be effective against known strains of flu, the possibility that an unexpected strain will pop up is very possible, researchers at the agency said. Officials have said, however, that all their testing shows the strains they found circulating most commonly right now in the country are covered by this year's vaccine.
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