People who have greater levels of internet addiction had around 30 per cent more cold and flu symptoms than those with less problematic internet usage.

重度网瘾患者出现的感冒和流感症状比网络依赖度较低的人多30%左右。

And researchers found people who are addicted to the internet may suffer from great stress when they are disconnected from the net.

研究人员还发现沉溺于网络的人在网络无法连接时可能感受到巨大的压力。

This cycle of stress and relief associated with internet addiction may lead to altered levels of cortisol, a hormone that impacts on the immune system, Professor Read and his team noted.

里德教授以及他的团队指出，这种因网瘾而产生的压力与解压的循环会导致皮质醇水平的改变，皮质醇是一种会对免疫系统造成影响的荷尔蒙。

Professor Read said: 'It may also be that those who spend a long time alone on the internet experience reduced immune function as a result of simply not having enough contact with others and their germs.'

里德教授说：“也可能是独自上网时间较长的人同他人以及他人身上的病菌接触较少，导致免疫系统功能下降。

The team found most people reported using the internet on average for six hours a day.

该研究团队发现大多被研究人员平均每天上网6个小时。

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