About 1 in 3 adults do not plan to get a flu shot—and many underestimate the deadliness of the disease.
This year's dose is about 50 percent effective against the predominant flu strain, vastly outperforming last year's formulation.
Influenza activity is high across the nation—get the 411 on flu symptoms.
As flu season picks up throughout the country, the elderly are most at risk of complications.
