In a small study, researchers in the US found that 18% of children who had suffered a stroke had a minor infection, such as from a cold or the flu, or from a urinary tract or gastrointestinal infection, a week before the stroke.
Although the risk remains low, affecting only two to 13 out of every 100,000 children annually, it raises concerns that having a cold or the flu may trigger a stroke in children.
They also found that children who had only received some, few or none of their routine vaccinations were seven times more likely to have a stroke than those who received most or all of their vaccinations.
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