Researchers believe the reasons may be both objective as in happiness boosting immune and subjective as in happy people being less troubled by a scratchy throat or runny nose.

• 研究人员认为，这可以从客观和主观两方面来解释，从客观上说，快乐的情绪可以增强人体的免疫力；从主观上说，快乐的人对于嗓子疼、流鼻涕等感冒症状没那么敏感。