101
Sa
fe
ty
connect
ed t
o the t
elephone
wiring in a house, t
ypicall
y
oper
ate a
t far lo
w
er po
w
er le
ve
ls,
and th
us pr
oduce RF e
xposur
es
far belo
w the FCC safe
ty
limit
s.
4. Wha
t ar
e the r
esult
s of the
re
sear
ch done alr
ead
y?
The r
esear
ch done th
us far ha
s
pr
oduced conflicting r
esult
s, and
man
y studie
s ha
ve
suffer
ed fr
om
fla
w
s in their r
esear
ch me
thods.
Animal e
xperiment
s in
ve
stiga
ting
the effect
s of R
adio F
requency
(RF) ener
gy e
xposur
es
char
act
eristic of wir
ele
ss phone
s
ha
ve
yielded conflicting r
esult
s
tha
t oft
en canno
t be r
epea
ted in
other labor
atorie
s. A fe
w animal
studie
s, ho
w
ev
er,
ha
ve
sug
ge
st
ed
tha
t lo
w le
vels of RF could
acceler
ate the de
velopment of
cancer in labor
atory animals.
Ho
w
ev
er,
man
y of the studie
s
tha
t sho
w
ed incr
ea
sed tumor
de
velopment used animals tha
t
had been gene
ticall
y engineer
ed
or tr
ea
ted with cancer
-causing
chemicals so a
s t
o be pr
e-
disposed t
o de
velop cancer in
the absence of RF e
xposur
e.
Other studie
s e
xposed the
animals t
o RF for up t
o 2
2
hour
s
per da
y. The
se conditions ar
e
no
t similar t
o the conditions
under which people use wir
ele
ss
phone
s, so w
e do no
t kno
w with
cer
taint
y wha
t the r
esult
s of such
studie
s mean for h
uman health.
Thr
ee lar
ge epidemiology studie
s
ha
ve
been published since
December 2
000. Be
tw
een them,
the studie
s in
ve
stiga
ted an
y
possible a
ssocia
tion be
tw
een the
use of wir
ele
ss phone
s and
primary br
ain cancer
, glioma,
meningioma, or acoustic
neur
oma, tumor
s of the br
ain or
saliv
ary gland, leuk
emia, or o
ther
cancer
s. None of the studie
s
demonstr
ated the e
xist
ence of
an
y harmful health effect
s fr
om
