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Changes in the Blood Count of Growing Rats Irradiated with a Microwave Pulse Field

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Jana Pazderova-Vejlupkova, M.D., Marcel Josifko · 1979

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Pulsed microwave radiation at WiFi-like frequencies caused measurable blood changes and growth delays in developing rats.

Plain English Summary

Summary written for general audiences

Researchers exposed growing rats to pulsed microwave radiation at 2,736 MHz for 7 weeks and found significant changes in blood composition, including reduced white blood cell counts and lower hematocrit values. The blood changes gradually disappeared within 10 weeks after exposure ended, but the rats showed slower weight gain during recovery.

Why This Matters

This 1979 study reveals that microwave radiation at frequencies similar to modern WiFi can measurably alter blood composition in developing animals. The power density used (24.4 mW/cm²) is actually higher than typical consumer exposures, but the pulsed nature at 395 Hz mirrors the modulation patterns found in many wireless technologies today. What's particularly concerning is that these effects occurred in growing rats during a critical developmental period. The temporary nature of the blood changes might seem reassuring, but the persistent impact on growth rate suggests deeper physiological disruption. The science demonstrates that even when obvious thermal effects are minimal (temperature rose only 0.5°C), biological systems can still respond significantly to microwave radiation.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Jana Pazderova-Vejlupkova, M.D., Marcel Josifko (1979). Changes in the Blood Count of Growing Rats Irradiated with a Microwave Pulse Field.
Show BibTeX
@article{changes_in_the_blood_count_of_growing_rats_irradiated_with_a_microwave_pulse_fie_g4571,
  author = {Jana Pazderova-Vejlupkova and M.D. and Marcel Josifko},
  title = {Changes in the Blood Count of Growing Rats Irradiated with a Microwave Pulse Field},
  year = {1979},
  
  
}

Quick Questions About This Study

Yes, rats exposed to 2,736 MHz pulsed microwaves showed significantly lower hematocrit values, reduced white blood cell counts, and fewer lymphocytes during the second half of a 7-week exposure period.
The blood changes gradually disappeared within 10 weeks after microwave exposure ended, but rats continued showing slower weight gain throughout the recovery period, suggesting lingering physiological effects.
A mean power density of 24.4 mW/cm² of pulsed microwave radiation was sufficient to cause significant blood composition changes in growing rats over 7 weeks of exposure.
Yes, microwave radiation pulsed at 395 Hz significantly slowed body weight gain in rats during the post-exposure recovery period, indicating developmental impacts from the modulated signal.
Yes, this study showed significant blood count changes when body temperature increased by only 0.5°C, demonstrating that non-thermal biological effects can occur at relatively low heating levels.