There is still no evidence mobile phones harm human health, says a major safety review for the UK's Health Protection Agency (HPA). Scientists looked at hundreds of studies of mobile exposure and found no conclusive links to cancer risk, brain function or infertility. However, they said monitoring should continue because little was known about long-term effects. The HPA said children should still avoid excessive use of mobiles.

　　It is the biggest ever review of the evidence surrounding the safety of mobile phones. There are now an estimated 80 million mobiles in the UK, and because of TV and radio broadcasting, Wi-Fi, and other technological developments, the study said exposure to low-level radio frequency fields was almost universal and continuous. A group of experts working for the HPA looked at all significant research into the effects of low-level radio frequency.

　　'Relatively reassuring'

　　They concluded that people who were not exposed above UK guideline levels did not experience any detectable symptoms. That included people who reported being sensitive to radio frequency. They also said there was no evidence that exposure caused brain tumours, other types of cancer, or harm to fertility or cardiovascular health.

　　But they said very little was known about risks beyond 15 years, because most people did not use mobile phones until the late 1990s. Prof Anthony Swerdlow, who chaired the review group, said it was important to continue monitoring research.

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