8,700 Studies Reviewed. 87.0% Found Biological Effects. The Evidence is Clear.
Shield Your Body
Cardiovascular

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

Bioeffects Seen

Jana Pazderová-Vejlupková, Marcel Josífko · 1979

Share:

Pulsed microwave radiation at WiFi-like frequencies significantly altered blood cell counts in growing rats, with effects reversing after exposure ended.

Plain English Summary

Summary written for general audiences

This 1979 study exposed growing rats to pulsed microwave radiation at 2,736.5 MHz for 7 weeks and tracked blood changes. The radiation significantly reduced hematocrit levels, white blood cell counts, and lymphocyte numbers during exposure, with effects gradually reversing over 10 weeks after exposure ended. The study demonstrates that microwave radiation can measurably alter blood composition in developing animals.

Why This Matters

This early research provides important evidence that pulsed microwave radiation can disrupt normal blood cell development and immune function. The 2,736.5 MHz frequency falls within the range used by modern WiFi and some cellular technologies, making these findings particularly relevant today. What's striking is that these blood changes occurred at power densities of 24.4 mW/cm² - levels that are actually higher than typical consumer device exposures but within ranges that can occur with prolonged close-proximity use of wireless devices.

The fact that effects were reversible offers some reassurance, but the study raises important questions about chronic exposure during critical developmental periods. The researchers documented clear biological responses in growing animals, including compromised immune cell counts that took 10 weeks to normalize. This suggests our bodies can recover from EMF exposure, but also that ongoing exposure during growth and development deserves careful consideration.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Jana Pazderová-Vejlupková, Marcel Josífko (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_g4598,
  author = {Jana Pazderová-Vejlupková and Marcel Josífko},
  title = {Changes in the Blood Count of Growing Rats Irradiated with a Microwave Pulse Field},
  year = {1979},
  
  
}

Quick Questions About This Study

The study used 2,736.5 MHz pulsed microwave radiation, a frequency close to modern WiFi and some cellular bands. This frequency was pulsed at 395 Hz with 2.6 microsecond pulse widths, creating intermittent exposure patterns similar to wireless communication systems.
Blood changes appeared in the second half of the 7-week exposure period and gradually normalized over 10 weeks after radiation stopped. The most affected parameters were hematocrit levels, total white blood cells, and lymphocyte counts, all showing significant decreases during exposure.
The study used 24.4 mW/cm² average power density, which is higher than typical consumer device exposures but within ranges possible during prolonged close contact with wireless devices. This level caused measurable temperature increases of up to 0.5°C in the rats.
No, the blood changes were reversible. Hematocrit levels, white blood cell counts, and lymphocyte numbers all returned to normal levels within 10 weeks after the microwave exposure ended, suggesting the body can recover from this type of EMF exposure.
Hematocrit values, total leukocyte counts, and absolute lymphocyte numbers showed the most significant decreases during exposure. Additionally, alkaline phosphatase activity in neutrophils increased initially then dropped, and body weight gain slowed during the post-exposure recovery period.