"More recently, other scientific laboratories in North
America, Europe and elsewhere have reported certain biological
effects after exposure of animals ("in vivo") and
animal tissue ("in vitro") to relatively low levels
of RF radiation. These reported effects have included certain
changes in the immune system, neurological effects, behavioral
effects, evidence for a link between microwave exposure and
the action of certain drugs and compounds, a "calcium efflux"
effect in brain tissue (exposed under very specific conditions),
and effects on DNA.
Some studies have also examined the possibility of a link between
RF and microwave exposure and cancer. Results to date have been
inconclusive. While some experimental data have suggested a
possible link between exposure and tumor formation in animals
exposed under certain specific conditions, the results have
not been independently replicated. In fact, other studies have
failed to find evidence for a causal link to cancer or any related
condition. Further research is underway in several laboratories
to help resolve this question.
In general, while the possibility of "non-thermal"
biological effects may exist, whether or not such effects might
indicate a human health hazard is not presently known. Further
research is needed to determine the generality of such effects
and their possible relevance, if any, to human health. In the
meantime, standards-setting organizations and government agencies
continue to monitor the latest experimental findings to confirm
their validity and determine whether alterations in safety limits
are needed in order to protect human health."
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