Two United States government studies of cellphone radiation have found a weak link to an increased risk of cancer in animals. But government officials and scientists are telling cellphone users not to worry. They say it is safe to use your mobile device. Earlier studies of cellphone users had found little reason for concern. The latest research took a close look at the effects of very high radiation levels in animals to answer some questions that could not be tested on human subjects. In one study, researchers left cellphones in an area with rats. The researchers say radiation from the devices may have been responsible for a small increase in an unusual form of heart tumor in male rats. Yet there were no big problems in female rats or in a separate study of mice. The Associated Press says the scientists could not find strong evidence for concern about brain tumors.
