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15
house, typically operate at far lower power
levels, and thus produce RF exposures far
below the FCC safety limits.
4. What are the results of the research
done already?
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 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 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.
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.
5. What research is needed to decide
whether RF exposure from wireless
phones poses a health risk?
A combination of laboratory studies and
epidemiological studies of people actually
using wireless phones would provide some
of the data that is needed. Lifetime animal
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