Moscow Signal. https://pubmed.ncbi.nlm.nih.gov/30676008/ This episode, a classic Cold War affair, has acquired enormous importance in the discussions on the **effect of non-ionizing radiation on people's health**. In 2011, the International Agency for Research on Cancer (IARC) classified radiofrequency electromagnetic fields as being a possible human carcinogen (Group 2B), but the results of recent laboratory and epidemiological studies have led some researchers to conclude that **radiofrequency electromagnetic fields should be reclassified as a human carcinogen** instead of merely a possible human carcinogen.