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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 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.
7. 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,
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