He also tested his erythrocyte sedimentation rate (ESR). ESR serves as an indicator of levels of inflammation and infection, with falling levels marking a rise in immune activity. Cousins 'testing revealed that his ESR fell when he laughed.
他也測量自己的紅血球沉降率（用來判定發炎與感染程度的指標，下降表示抵抗力提升），發現笑時，紅血球沉降率確實會下降。