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CDM9200VW User Guide
Safety and Warranty
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.
6. What is the FDA doing to find out more about the
possible health effects of wireless phone RF?
The FDA is working with the U.S. National Toxicology Program
and with groups of investigators around the world to ensure that
high priority animal studies are conducted to address important
questions about the effects of exposure to radio frequency
energy (RF). The FDA has been a leading participant in the
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