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122
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.
However, none of the studies
can answer questions about
longterm 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
are needed. Lifetime animal
Safety Guidelines
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