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Effect of isothermal radiofrequency radiation on cytolytic T lymphocytes.

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Cleary, SF, Du, Z, Cao, G, Liu, LM, McCrady, C · 1996

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RF radiation at microwave frequencies directly suppresses immune cell function independent of heating effects, suggesting wireless devices may compromise immunity.

Plain English Summary

Summary written for general audiences

Researchers exposed immune cells called T lymphocytes to 2.45 GHz radiofrequency radiation (the same frequency used in microwave ovens and WiFi) for 24 hours. They found that high-intensity RF exposure significantly reduced the cells' ability to multiply and function properly, while lower intensities caused initial stimulation followed by suppression. The effects were not simply due to heating, suggesting RF radiation directly interferes with immune cell function.

Why This Matters

This study provides compelling evidence that RF radiation can disrupt immune system function at the cellular level. The researchers used 2.45 GHz radiation, the same frequency found in microwave ovens, WiFi routers, and many wireless devices. What makes this research particularly significant is that the scientists ruled out heating effects, demonstrating that RF radiation has direct biological impacts on immune cells beyond just warming tissue. The fact that even lower-intensity exposures caused delayed suppression of immune cell proliferation suggests that our wireless devices may be subtly compromising immune function over time. While the exposure levels in this study were higher than typical consumer device emissions, the dose-dependent response pattern raises important questions about cumulative effects from our increasingly wireless world.

Exposure Details

SAR
25 W/kg
Electric Field
98.4 V/m
Source/Device
2450 MHz
Exposure Duration
24 hours

Exposure Context

This study used 98.4 V/m for electric fields:

This study used 25 W/kg for SAR (device absorption):

Building Biology guidelines are practitioner-based limits from real-world assessments. BioInitiative Report recommendations are based on peer-reviewed science. Check Your Exposure to compare your own measurements.

Where This Falls on the Concern Scale

Study Exposure Level in ContextStudy Exposure Level in ContextThis study: 25 W/kgExtreme Concern - 0.1 W/kgFCC Limit - 1.6 W/kgEffects observed in the Extreme Concern rangeFCC limit is 0x higher than this level
A logarithmic frequency spectrum from 10 Hz to 100 GHz showing where this study's 2.45 GHz exposure sits relative to common EMF sources.Where This Frequency Sits on the EMF SpectrumELFVLFLF / MFHF / VHFUHFSHFmm10 Hz100 GHzThis study: 2.45 GHzPower lines50/60 Hz5G mm28 GHzLogarithmic scale

Study Details

To obtain insight regarding interaction mechanisms, we investigated effects of RF radiation exposure on interleukin 2 (IL-2) -dependent proliferation of cytolytic T lymphocytes (CTLL-2)

After exposure to RF radiation in the presence or absence of IL-2 cells were cultured at various phy...

Exposure to 2450 MHz RIF radiation at specific absorption rates (SARs) of greater than 25 W/kg (indu...

Comparison of the effects of temperature elevation and RF radiation indicated significant qualitative and quantitative differences.

Cite This Study
Cleary, SF, Du, Z, Cao, G, Liu, LM, McCrady, C (1996). Effect of isothermal radiofrequency radiation on cytolytic T lymphocytes. FASEB J 10(8):913-919. 1996.
Show BibTeX
@article{cleary_1996_effect_of_isothermal_radiofrequency_908,
  author = {Cleary and SF and Du and Z and Cao and G and Liu and LM and McCrady and C},
  title = {Effect of isothermal radiofrequency radiation on cytolytic T lymphocytes.},
  year = {1996},
  
  url = {https://pubmed.ncbi.nlm.nih.gov/8666169/},
}
PubMed: 8666169

Cited By (57 papers)

View all 57 citing papers on Semantic Scholar

Quick Questions About This Study

Research shows 2.45 GHz radiation (WiFi frequency) can impair immune cell function. A 1996 study found T lymphocytes exposed to this frequency had reduced ability to multiply and function properly, with effects not simply due to heating but direct interference with cellular processes.
Yes, microwave frequency radiation can affect immune function. Scientists exposed immune T cells to 2.45 GHz radiation and found significant reductions in cell proliferation and activity, suggesting radiofrequency exposure directly interferes with immune cell performance beyond simple heating effects.
Studies indicate 2.4 GHz radiation can harm cellular function. Research on immune cells showed this frequency reduced T lymphocyte multiplication and activity after 24-hour exposure, with effects varying based on radiation intensity and the cells' growth state during exposure.
RF radiation appears to directly interfere with immune cell activity. A study exposing T lymphocytes to 2.45 GHz found reduced cell proliferation and function, with lower intensities initially stimulating then suppressing cells, indicating complex biological interactions beyond thermal effects.
WiFi frequencies may compromise immune cell function. Research demonstrates 2.45 GHz exposure significantly reduces T lymphocyte proliferation and activity, with effects depending on radiation intensity and cellular state. These findings suggest potential immune system impacts from prolonged wireless exposure.