US cancer boss in mobiles warning
Studies time to time have been telling that mobile phone usages leads to all kinds if illness. Some Indian doctors found excessive use of mobile leading to the loss of sperm counts in humans. An earlier UK report said in 2005 that mobile phone use by children should be limited as a precaution - and that under-eights should not use them at all.
Mobile phones emit radio signals and electromagnetic fields that can penetrate the human brain, and some campaigners fear that this could seriously damage human health.
A US analysis by the University of Utah this year of thousands of brain tumour patients found no increased risk as a result of mobile use, but added that the effects from long-term use "awaits confirmation by future studies".
The director of a leading US cancer research institute has sent a memo to thousands of staff warning of possible higher risks from mobile phone use.
Ronald Herberman, of the University of Pittsburgh Cancer Institute, said users should not wait for definitive studies on the risk and should take action now.
He said children should use mobiles in emergencies only and adults should try to keep the phone away from the head.
No major academic study has confirmed a link to higher brain-tumour risks.