As sleep-deprived people ourselves, we started thinking of what to do about it.
作为睡眠不足的人，我们开始思考该做些什么。
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When people are sleep-deprived, there are higher levels of stress hormones in their bodies, which can decrease immune function.
当人们睡眠不足时，他们体内的应激激素水平会升高，造成免疫功能下降。
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"When people are sleep-deprived, there are higher levels of stress hormones in their bodies which can decrease immune function," says Doctor Felice of Northwestern University in Chicago.