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from flaws in their research
methods. Animal experiments
investigating the effects of
Radio Frequency (RF) energy
exposures characteristic of
wireless phones have yielded
conflicting results that often
cannot be repeated in other
laboratories. A few animal
studies, however, have
suggested that low levels of RF
could accelerate the
development of cancer in
laboratory animals. However,
many of the studies that
showed increased tumor
development used animals that
had been genetically
engineered or treated with
cancer-causing chemicals so as
to be pre-disposed to develop
cancer in the absence of RF
exposure. Other studies
exposed the animals to RF for
up to 22 hours per day. These
conditions are not similar to
the conditions under which
people use wireless phones, so
we do not know with certainty
what the results of such
studies mean for human health.
Three large epidemiology
studies have been published
since December 2000.
Between them, the studies
investigated any possible
association between the use of
wireless phones and primary
brain cancer, glioma,
meningioma, or acoustic
neuroma, tumors of the brain
or salivary gland, leukemia, or
other cancers. None of the
studies demonstrated the
existence of any harmful health
effects from wireless phone RF
exposures. However, none of
the studies can answer
questions about long-term
exposures, since the average
period of phone use in these
studies was around three years.
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