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Safety
thesource.Theso-called“cordlessphones,”whichhaveabaseunitconnectedto
thetelephonewiringinahouse,typicallyoperateatfarlowerpowerlevels,andthus
produceRFexposuresfarbelowtheFCCsafetylimits.
4. What are the results of the research done already?
Theresearchdonethusfarhasproducedconflictingresults,andmanystudieshave
sufferedfromflawsintheirresearchmethods.Animalexperimentsinvestigatingthe
effectsofRadioFrequency(RF)energyexposurescharacteristicofwirelessphones
haveyieldedconflictingresultsthatoftencannotberepeatedinotherlaboratories.A
fewanimalstudies,however,havesuggestedthatlowlevelsofRFcouldacceleratethe
developmentofcancerinlaboratoryanimals.However,manyofthestudiesthatshowed
increasedtumordevelopmentusedanimalsthathadbeengeneticallyengineeredor
treatedwithcancercausingchemicalssoastobepre-disposedtodevelopcancerin
theabsenceofRFexposure.OtherstudiesexposedtheanimalstoRFforupto22
hoursperday.Theseconditionsarenotsimilartotheconditionsunderwhichpeople
usewirelessphones,sowedonotknowwithcertaintywhattheresultsofsuchstudies
meanforhumanhealth.Threelargeepidemiologystudieshavebeenpublishedsince
December2000.Betweenthem,thestudiesinvestigatedanypossibleassociation
betweentheuseofwirelessphonesandprimarybraincancer,glioma,meningioma,or
acousticneuroma,tumorsofthebrainorsalivarygland,leukemia,orothercancers.
Noneofthestudiesdemonstratedtheexistenceofanyharmfulhealtheffectsfrom
wirelessphoneRFexposures.However,noneofthestudiescananswerquestions
aboutlong-termexposures,sincetheaverageperiodofphoneuseinthesestudieswas
aroundthreeyears.
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