8,655 Studies Reviewed. 86.9% Found Biological Effects. The Evidence is Clear.
Shield Your Body

Note: This study found no significant biological effects under its experimental conditions. We include all studies for scientific completeness.

Whole Body / GeneralPart of the Glaser Archive

Health Surveillance of Personnel Occupationally Exposed to Microwaves. I. Theoretical Considerations and Practical Aspects

No Effects Found

Przemyslaw Czerski, Maksymilian Siekierzynski, Andrzej Gidynski · 1974

Share:

1974 study of 841 microwave workers found no health effects at exposures 300x higher than modern phones.

Plain English Summary

Summary written for general audiences

Polish researchers studied 841 male microwave workers aged 20-45, comparing health effects between low exposure (below 0.2 mW/cm²) and high exposure (0.2-60+ mW/cm²) groups. They found no relationship between microwave exposure levels or duration and health disorders that would disqualify workers from microwave jobs. The study called for similar research at other power levels.

Figures from the Original Paper

Diagram extracted from the original research document.

graphPage 4 - Figure 1. Correlation between the duration of occupational exposure and age in group I and II.
p. 4 of the original PDF
Cite This Study
Przemyslaw Czerski, Maksymilian Siekierzynski, Andrzej Gidynski (1974). Health Surveillance of Personnel Occupationally Exposed to Microwaves. I. Theoretical Considerations and Practical Aspects.
Show BibTeX
@article{health_surveillance_of_personnel_occupationally_exposed_to_microwaves_i_theoreti_g5854,
  author = {Przemyslaw Czerski and Maksymilian Siekierzynski and Andrzej Gidynski},
  title = {Health Surveillance of Personnel Occupationally Exposed to Microwaves. I. Theoretical Considerations and Practical Aspects},
  year = {1974},
  
  
}
No DOI on file for this study.

Quick Questions About This Study

The high exposure group experienced 0.2 to 60+ mW/cm², which is roughly 300 times higher than typical cell phone emissions near your head today (around 0.2 mW/cm²). This represents significant occupational exposure levels.
Researchers studied 841 male workers aged 20-45 who were occupationally exposed to microwaves for various time periods. They divided this group into low and high exposure categories for comparison.
The study examined disorders considered contraindications for occupational microwave exposure - meaning health conditions severe enough that workers would be disqualified from microwave jobs. Specific conditions weren't detailed in the abstract.
No, researchers found no relationship between duration of occupational microwave exposure and health disorders. Workers exposed for longer periods didn't show higher rates of contraindicated health conditions than shorter-term workers.
The authors concluded that similar health surveillance studies should be conducted on worker groups exposed at other power density levels to better understand microwave health effects across different exposure ranges.