
A working group consisting of the World Health Organisation (WHO) and the International Agency for Research on Cancer (IARC) has classified the radiation emitted by mobile handsets as ‘possibly carcinogenic’.
The panel of 31 scientists from 14 countries concluded that there ‘could be some risk’ for phone users.
Dr. Jonathan Samet, chairman of the working group, said, “There could be some risk, and therefore we need to keep a close watch for a link between cell phones and cancer risk”.
Science blogger Ed Yong works for Cancer Research UK. He has written a very nice explanation of what the WHO announcement really means;
“It means that there is some evidence linking mobile phones to cancer, but it is too weak to make any strong conclusions. Specifically, IARC’s panel said that the evidence that mobile phones pose a health risk was “limited” for two types of brain tumours – glioma and acoustic neuroma – and “inadequate” when it comes to other types of cancer.
The Chairman of the group, Dr Jonathan Samet, said, “The conclusion means that there could be some risk, and therefore we need to keep a close watch for a link between cell phones and cancer risk.”
IARC classifies different things according to whether they are likely to cause cancer, from tobacco to viruses to certain jobs. They are the gold standard for this sort of thing. They have five possible categories of risk:
Group 1 is the highest, reserved for things like smoking, asbestos, alcohol and so on. It means that there’s extremely strong evidence that the thing in question causes cancer.
Group 2A includes things that are “probably carcinogenic to humans”. Here, the evidence is “limited” in humans, but “sufficient” from animal studies.
Group 2B – this is the one that mobile phones now fall under – means something is “possibly carcinogenic to humans”. It means there is “limited evidence” that something causes cancer in people, and even the evidence from animal studies is “less than sufficient”. Group 2B means that there is some evidence for a risk but it’s not that convincing. This group ends up being a bit of a catch-all category, and includes everything from carpentry to chloroform.”
It would appear that a decade after the Stewart Report (Independent Expert Group on Mobile Phones) we are no further on in our understanding – there is still insufficient evidence to conclude either way whether using a mobile phone does or doesn’t increase the risk of cancer.
The UK government’s ‘precautionary approach’ for mobile phone use, which includes the recommendation that mobile phone use by children for non-essential calls should be discouraged, still stands.
Image: Hello Operator, a Creative Commons Attribution (2.0) image from derekolson’s photostream





