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Safety Guidelines
with increasing distance from the
source. The so-called ‘ cordless
phones,’ which have a base unit
connected to the telephone wiring
in a house, typically operate at
far lower power levels, and thus
produce RF exposures far below the
FCC safety limits.
4.Whataretheresultsofthe
researchdonealready?
The research done thus far has
produced conflicting results, and
many studies have suffered from
flaws in their research methods.
Animal experiments investigating the
effects of radiofrequency energy (RF)
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 predisposed
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 don’t 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.