Change of radiofrequency electromagnetic exposure of children from 2020 to 2021: A report from Hokkaido Study

We recorded Japanese children’s exposure to radiofrequency electromagnetic fields (RF-EMF) using personal exposure meters from 2020 to 2021. There was no difference in the total exposure level during 2020 and 2021, in each recording place. However, the levels of each frequency bands were found to change between the recording years. The results suggest that the composition of the frequency bands to which children were exposed changed between 2020 and 2021 in Japan.