Some research even suggests that immunefunction is improved when we are around our friends.
一些研究甚至表明,当我们和朋友在一起时,免疫功能会得到改善。
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When people are sleep-deprived, there are higher levels of stress hormones in their bodies, which can decrease immunefunction.
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 immunefunction," says Doctor Felice of Northwestern University in Chicago.