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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 ten 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 radio
frequency 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 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.