This randomized experimental study (N=2,169) tested how different precautionary information formats about RF-EMF (with emphasis on 5G) affect public risk perception and trust in radiation protection authorities in Germany and Greece. Simple precautionary tips generally did not increase risk perception or reduce trust, while a conceptual explanation of the precaution/prevention distinction increased perceived risk compared with simpler information. Precautionary messages improved self-efficacy and perceived message consistency, and responses differed by country and gender.

This exposure-assessment study analyzed two years of continuous frequency-selective monitoring from 13 sensors in the five largest cities in Greece, focusing on the 3.6 GHz 5G band. It reports a gradual increase in 3.6 GHz environmental EMF levels over time and greater variability than legacy cellular bands, with 30-minute averaging reducing observed fluctuations. Despite the upward trend and variability, all measurements were reported to remain well below Greek and ICNIRP reference levels, and the authors emphasize the value of continuous monitoring as 5G deployment expands.