Ministère de la Santé et des Sports

Accueil > Téléphonie mobile et santé > Téléphones mobiles, leurs stations de base et la santé : les rapports scientifiques

[ 17 juin 2008 ]

SUMMARY OF THE REPORT

"Do the conclusions ofrecent reports summarizing our current knowledge of the health hazards related to the use of mobile telephones and their accessories justify the adaptation of the risk management regulations recently adopted by the French and European authorities ?". This was the main thrust of the question submitted to the group of experts brought together by the Direction Générale de la Santé (Health General Directorate).

The frequency range used for mobile telephony varies according to companies and their technologies, ranging from 850 to 1900 MHz. The range will be extended to 2200 MHz with the new UMTS technology, and to the 400 MHz waveband with the TETRA system, currently under development. These are part of the much wider range of radio frequencies present everywhere in our environment, at home (microwave cooking, etc.), at work (industrial heating systems, etc.), or in public places (radio and television transmitters, burglar alarm systems and remote-control devices, etc.), especially in urban areas.

The development of telecommunications has been followed by research into the effects of radio-frequency electromagnetic fields (RF) on biological systems. Work first started in this field after the Second World War. This research focused particularly on mechanisms that could link exposure of human cells to the development of cancers. It is still too soon, however, to assess any long-term effects. The highly-complex physical and biological phenomena involved necessitated the development of new experimental, measuring, and observation procedures that were not always completely controlled in the early research projects. This is why it is still difficult to draw clear conclusions, in spite of the enormous volume of scientific work on the subject. Some research evidenced short-term modifications in certain physiological or biochemical parameters, or even fine neuro-sensory functions, while other work contradicted these results. The significance of these observations in predicting the occurrence of long-term effects is debatable.

The public are naturally concerned by this difficulty in drawing conclusions. The issue of potential health hazards resulting from exposure to RF takes on a very special importance when it is considered that 30 million people are users of mobile telephone in France and that the expected market is 44 million within 4 years. Even if the individual risk were very small, the very number of people involved would produce a considerable impact in terms of public health.

On the other hand, mobile telephones are also a health safety factor. The speed with which the alert can be given in case of accident, fire, or other dangerous situations, and the effectiveness of emergency services have been considerably improved by the widespread availability of this technology, which has already saved many lives, worldwide. An evaluation of the trade-off between risks, if there are any, and potential advantages, was not part of the expert group’s brief, which focused solely on risk assessment, based on the analysis of scientific data alone.

The first chapter of this report describes, in detail, the critical synthesis approach used to develop the group of experts’ opinion and recommendations. The second chapter presents the sources and characteristics of the electromagnetic fields associated with mobile telephony, and the known or investigated mechanisms by which they interact with living matter. The third chapter gives the threshold limit values for public exposure to RF associated with mobile telephony and explains the scientific basis for the figures.

The fourth chapter is the longest. It summarises the group of experts’ analysis of the current state of scientific knowledge. Several scientific bodies have recently produced reports containing comprehensive analyses of the biological and medical effects of RF. These bodies, consisting of top-level experts in the various scientific fields involved, have analysed all the scientific data available at the time. The group of experts used five summary documents, covering several hundreds of articles published in the scientific literature, to carry out their mission. In addition to these ‘basic reports’, seven ’additional documents’ were taken into consideration : symposium proceedings and summary articles providing interesting information. The group of experts also made sure to take the most recent published work into consideration, right up to the day this report was completed. Finally, the group interviewed about twenty people from scientific organisations, administrations, industry, associations, and politics, both to obtain further information and identify society’s concerns on this issue more fully.

The group of experts had two main objectives in carrying out this assessment of scientific knowledge :

• To define the areas in which there were convincing scientific data proving the existence or, a contrario, the absence of biological and medical consequences following exposure to RF related to the use of mobile telephones and the operation of base stations (i.e. ‘what we know’),
• To highlight the areas in which currently-available scientific data does not exclude the possibility of biological and medical effects, without necessarily confirming their existence (i.e. ‘what is uncertain’). The group of experts’ conclusions and recommendations are presented in the fifth chapter. They are based on the following considerations :

• There is considerably less personal exposure in the vicinity of base stations – with the exception of exclusion areas – than there is when making a call with a mobile phone.
  
• Scientific data indicate, with relative certainty, that, during exposure to RF from a mobile phone, a variety of biological effects occur (eg. electroencephalogram profile, reaction time, etc.) at energy levels that do not cause any local increase in temperature. However, in the current state of knowledge of these non-thermal effects, it is not yet possible to determine whether they represent a health hazard.
  
• Although this assertion is backed up by little scientific argument, the hypothesis that certain medical effects are caused by the low-level RF fields associated with mobile telephones cannot be completely excluded, in the current state of knowledge. Experimental and epidemiological research into a range of health problems, including brain cancers and headaches, is currently in progress ; the role of exposure to RF in these symptoms or diseases has not yet been clarified. However, in view of the exposure levels observed, the group of experts does not back the hypothesis that there is a health risk for populations living in the vicinity of base stations.
  
• If future research were to validate this hypothesis, i.e. demonstrate the existence of health hazards, the risk, at an individual level, would probably be very low. Indeed, it is reassuring to note that it has not yet been demonstrated, in spite of the considerable amount of work done over the past several years. However, if mobile phone radiofrequency fields were hazardous , the very high number of mobile telephone users could mean that, even if the individual risk were very low, the impact on public health could be considerable.
  
• The risk of accident and fatality associated with the use of mobile telephones when driving has definitely been established. In the current state of knowledge, this is the only known health risk, albeit a very serious one.For all of these reasons, and in view of the brief they were given, the group of experts recommend a risk management approach based on the precautionary principle, aimed at reducing public exposure to RF associated with mobile telephony to the lowest possible level compatible with service quality and justified by current scientific data. The various measures recommended are described in the full report. The objective is also to ensure that users and the public have access to comprehensive information on their exposure. The group of experts consider that these recommendations would make it possible to apply the precautionary principle in an enlightened way, i.e. on the basis of a rational approach.

The sixth and last chapter is devoted to recommendations for advanced research to elucidate the remaining uncertainties in priority areas. Proposals are made concerning ways of funding research that would guarantee the scientists’ independence from the various interests involved.

|At the end of their mission, the group of experts would like to emphasise that they have been able to work completely independently, both from industry and public authorities. The Direction Générale de la Santé (Health General Directorate) provided them with the effective, discreet support necessary to complete their task.|

Source : Les téléphones mobiles, leurs stations de base et la santé (rapport du 18 Janvier 2001)
Mise en ligne : Direction générale de la santé (Janvier 2001)