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Section 4A: Safety Guidelines 210
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.
What is FDA doing to find out more about the possible health effects of
wireless phone RF?
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
radiofrequency energy (RF).
FDA has been a leading participant in the World Health Organization
International Electromagnetic Fields (EMF) Project since its inception in 1996.
An influential result of this work has been the development of a detailed agenda
of research needs that has driven the establishment of new research programs
around the world. The Project has also helped develop a series of public
information documents on EMF issues.
FDA and the Cellular Telecommunications & Internet Association (CTIA) have a
formal Cooperative Research and Development Agreement (CRADA) to do
research on wireless phone safety. FDA provides the scientific oversight,
obtaining input from experts in government, industry, and academic
organizations. CTIA-funded research is conducted through contracts to
independent investigators. The initial research will include both laboratory
studies and studies of wireless phone users. The CRADA will also include a
broad assessment of additional research needs in the context of the latest
research developments around the world.
What steps can I take to reduce my exposure to radiofrequency energy from
my wireless phone?
If there is a risk from these products--and at this point we do not know that there
is--it is probably very small. But if you are concerned about avoiding even
potential risks, you can take a few simple steps to minimize your exposure to
radiofrequency energy (RF). Since time is a key factor in how much exposure a
person receives, reducing the amount of time spent using a wireless phone will
reduce RF exposure.
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If you must conduct extended conversations by wireless phone every day,
you could place more distance between your body and the source of the
RF, since the exposure level drops off dramatically with distance. For
example, you could use a headset and carry the wireless phone away from
your body or use a wireless phone connected to a remote antenna.