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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 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.