Flu Shots May Not Protect the Elderly or the Very Young

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Every year around this time, 120 million Americans roll up their sleeves to get their annual flu shots. Since 2010, the U.S. Centers for Disease Control and Prevention has recommended yearly jabs for every healthy American over the age of six months. The goal is to curb the spread of infection and minimize the risk for potentially dangerous complications such as pneumonia, particularly among the elderly and the very young. But science on the vaccine’s efficacy is scant among those two vulnerable groups. And although healthy adults do get some protection, it may not be as robust as they expect.
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