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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 are needed.
Lifetime animal exposure studies could
be completed in a few years. However,
very large numbers of animals would
be needed to provide reliable proof of
a cancer promoting effect if one exists.
Epidemiological studies can provide
data that is directly applicable to human
populations, but 10 or more years follow-
up may be needed to provide answers
about some health effects, such as cancer.
This is because the interval between the
time of exposure to a cancer-causing
agent and the time tumors develop - if
they do- may be many, many years. The
interpretation of epidemiological studies
is hampered by difficulties in measuring
actual RF exposure during day-to-day use
of wireless phones. Many factors affect
this measurement, such as the angle at
which the phone is held, or which model of
phone is used.
Safety Guidelines