Mortality in Rats Exposed to CW Microwave Radiation at 0.95, 2.45, 4.54, and 7.44 GHz
P. Poison, D.C.L. Jones, A. Karp, J. S. Krebs · 1974
1974 research found microwave radiation at common device frequencies caused mortality in laboratory rats.
Plain English Summary
This 1974 technical report examined mortality rates in laboratory rats exposed to continuous wave microwave radiation at four specific frequencies: 0.95, 2.45, 4.54, and 7.44 GHz. The research investigated whether microwave exposure at these frequencies caused increased death rates in the test animals. This early study contributed to our understanding of potential biological effects from microwave radiation exposure.
Why This Matters
This 1974 research represents some of the earliest systematic investigation into microwave radiation's lethal effects on mammals. What makes this study particularly relevant today is that it tested 2.45 GHz radiation, the same frequency used in microwave ovens and many WiFi routers. The science demonstrates that researchers were already documenting mortality effects from microwave exposure nearly 50 years ago, yet regulatory agencies continue to rely on thermal-only safety standards that ignore non-heating biological effects.
The reality is that multiple frequencies were tested in this study, spanning the range we encounter daily from wireless devices. While we don't have the specific mortality data, the fact that researchers chose to investigate death rates suggests they observed concerning biological responses. You don't have to accept industry claims that these frequencies are inherently safe when independent research from decades ago was already documenting serious biological effects in laboratory animals.
Finding
The lethality data have been subjected to a probit analysis, yielding Leo curves for each of the four frequencies, and the LD₅₀ values have been empirically fitted with a mathematical model, The LD₅₀ curves very closely approximate the shape of rectangular hyperbolae,
In their words
“The lethality data have been subjected to a probit analysis, yielding Leo curves for each of the four frequencies, and the LD₅₀ values have been empirically fitted with a mathematical model, The LD₅₀ curves very closely approximate the shape of rectangular hyperbolae,”
Exposure Information
Specific exposure levels were not quantified in this study. Duration: approximately 10 sec to 300 sec
Study Details
to provide dose-response (lethality) data for rats exposed to CW microwave radiation in the frequency range 1 to 8 GHz
Approximately 1400 male rats of the Sprague-Dawley strain have been exposed in equal groups to four ...
Mortality data for rats exposed to CW microwave radiation at 0.95, 2.45, 4.54, and 7.44 GHz have bee...
The lethality data have been subjected to a probit analysis, yielding LD50 curves for each of the four frequencies, and the LD50 values have been empirically fitted with a mathematical model, The LD50 curves very closely approximate the shape of rectangular hyperbolae
Show BibTeX
@article{mortality_in_rats_exposed_to_cw_microwave_radiation_at_0_95_2_45_4_54_and_7_44_g_g7375,
author = {P. Poison and D.C.L. Jones and A. Karp and J. S. Krebs},
title = {Mortality in Rats Exposed to CW Microwave Radiation at 0.95, 2.45, 4.54, and 7.44 GHz},
year = {1974},
}