Report Calls for More Research on Health Effects from Cell Phones

The rapid increase in the use of wireless communication devices in recent years has been accompanied by a significant amount of research into potential health effects from high exposure to radiofrequency (RF) energy emitted by these devices. A new National Research Council report, requested by the U.S. Food and Drug Administration, identifies research that could further extend understanding of long-term low exposure to these devices.

The committee that wrote the report identified research needs and gaps based on presentations made by international experts and discussion sessions with attendees at a three-day workshop last August that evaluated disciplines and topics such as measurement of RF energy and exposure, studies on human populations, human laboratory measurements and animal and cell biology. In the report, research needs are defined as studies that, in the near term, could increase understanding of any potential adverse effects of RF energy on humans. Gaps are defined as research studies that are of lower priority or that should not be carried out until the results of current research studies are evaluated. The committee did not evaluate potential health effects or recommend how the identified research needs should be met.

One research need the committee identified is studies of any potential health consequences from multiple, long-term, low-intensity RF exposure as opposed to most of the present data that evaluates acute effects on healthy adults during short exposures to RF fields. For instance, measuring the amount of RF energy received by children, pregnant women and fetuses from wireless devices, and RF base station antennas could help define exposure ranges for various populations.

The evolving types of antennas for hand-held wireless communication devices also should be analyzed for the amount of RF energy they deliver to different parts of the body so the data would be available for use in future studies, the committee said. Studies to understand the effects of RF energy irradiation from cell phone antennas on the human head have already been conducted. However, for most of these studies, the research has assumed that cell phones have pull-out linear rod antennas and are held against a person's ear. Many newer telephones use built-in antennas for which additional SAR data are needed, the report states. Also, wireless technology is now used in laptop computers and hand-held texting and Web-surfing devices, in which the antennas are close to other parts of the body.

More information on the report, "Identification of Research Needs Relating to Potential Biological or Adverse Health Effects of Wireless Communication," can be found at http://www.nap.edu/catalog.php?record_id=12036.

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