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Safety
What research is neede d to decide whether RF
exposure from wireless pho nes poses a health
risk?
A combination of laboratory studies and epidemio logical 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 prov ide data that
is directly applicable to human populations, but 10 or more years’
follow-up may be needed to provide answers about some he alth
effects, such as cancer. This is because the interval betwee n the
time of exposure to a cancer-causing agent and the time tumo rs
develop—if they do—m ay 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 phon es. Many
factors affect this measurement, such as the angle at which th e phone
is held, or which model of phone is used.
What is FDA doing to find out more about th e
possible health effe cts of wireless phone RF?
FDA is working with the U.S. National Toxicology Program and wi th
groups of investigators around the world to ensure that high priority
animal studies are conducted to address important questio ns about
the effects of exposure to radiofrequency energy (RF).
FDA has been a leading participant in the World Health Organizati on
International Electromagnetic Fields (EMF) Project since its
inception in 1996. An influential result of this work has be en 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.
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