But the UK study suggested that instead of offering protection, some hands-free kits acted as aerials and tripled the amount of radiation reaching the brain.
"We cannot emphasise enough that measles is an illness that can kill, or leave patients with permanent complications including severe brain damage, and the only protection is two doses of the MMR vaccination, " she added.
These have been reviewed critically by the International Commission on Non-Ionizing Radiation Protection, which found no convincing evidence of a link between cell phone use and the occurrence ofbrain tumors.