The WHO International EMF Project is currently finalizing a practical framework fordeveloping health protection measures in areas of scientific uncertainty. In general terms, thisaims to develop a set of policy options for protecting public health according to the degree ofscientific uncertainty and the anticipated severity of the harm that might ensue, taking intoaccount the size of the affected population and the cost. A principal requirement is that thesetypes of policies be adopted in such a way as not to undermine scientific assessments of risk andscience-based exposure limits. Effective risk communication and consultation betweenstakeholders are also seen as integral parts of this process.