Some States May See Flu Vaccine Surplus

A patient receives a flu shot.

A patient receives a flu shot. Many states are expanding their rules on who can get a flu shot. Michigan, Utah and Wyoming have lifted all restrictions. CDC hide caption

itoggle caption CDC

After much concern over a flu vaccine shortage this fall, many Americans who were at most risk from the flu have been inoculated. But now health officials are worried that some states have more vaccine than they're using. NPR's Richard Knox reports.

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