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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.
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.