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- We know the vaccine works. Each year, the World Health Organization convenes a panel of experts to predict the strains of the flu that are expected to cause that year’s seasonal infections. The overall efficacy is based on how close their predictions come. But even if it’s not a perfect match, it still provides some protection against other strains of the virus.
And yet, the Centers for Disease Control numbers show the rates of flu vaccination vary greatly based on age. In children, it is 45 percent. For people 18-49, it falls to 26 percent. For people aged 50-64, it rises back to 43 percent. And for people over 65, it jumps to 67. percent.