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A Second Wave of Flu May Be On the Way, CDC Warns

The bulk of this year’s deadly flu season was dominated by the H3N2 virus, an influenza A strain that is more severe and less receptive to vaccines than other types of the disease. As the season winds down, however, influenza B has overtaken influenza A, setting the scene for a possible second wave of flu, according to Centers for Disease Control and Prevention (CDC) data.