Question

急，大家帮帮忙，翻译下这段英语。我急用。在这谢谢大家了。

There is also some evidence to suggest that laughter help the body's immune system,that is, the system while another group of students served as the control group--in other words, Doctors checked the blood of the students in both groups and found that the people in the group that watched the video had an increase in the activity of their white blood cells,that is,the cells which fight infection

Answer 1

同样也有证据证明笑有助于人的免疫系统，医生检查了两组同学的血压然后发现看了视频的那组同学体内抵抗感染的白细胞活力增加了。
大意是这样，你中间从that is到the control group这段有问题，译不了。不过对理解没影响。