Find out what makes a person more at risk for serious complications.
, a life-threatening reaction to an infection that happens when bacteria have entered the bloodstream.
But even healthy people can die of the flu, as news reports of deaths among children often suggest. “Young kids who look really healthy may be getting overwhelmed by their own immune response,” Dr. Salber says. In some cases, the body may increase immune defenses so much that infection-fighting proteins build up in the blood and damage other organs. “For example, you can get this immune response in the lungs,” she says, which in turn makes it hard to breathe.
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