Laughter may be the best medicine,but even looking forward to having a good laugh can boost the immune system and reduce stress,U.S. researchers reported on Wednesday.

• 笑也许是公认的最好的良药，而美国研究者11月6号公布的研究结果更显示: 即便是有这种开怀大笑的愿望，也同样能够增进免疫功能，减少压力。