The NC State Student Health Center put a notice on Facebook confirming at least four cases in just the first week of class.
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The university is telling students on social media that although these cases are earlier than usual, it's not unheard of.
Students are being encouraged to see a doctor immediately if they feel sick. Medical experts are also recommending hand washing, getting a flu shot and staying away from classes or crowds.
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Flu activity usually picks up in October and peaks between December and February.