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
radiofrequency energy (RF). The 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. The FDA and the Cellular
Telecommunications & Internet Association (CTIA) have a formal Cooperative
Research and Development Agreement (CRADA) to do research on wireless
phone safety. The FDA provides the scientific oversight, obtaining input from
experts in government, industry, and academic organizations. CTIA funded
research is conducted through contracts with 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.
Safety Guidelines
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