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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.
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