Exposure to non-ionising radiation has become almost unavoidable. Electric devices produce extremely low frequency magnetic fields (ELF-MF) and radio-frequency electromagnetic fields (RF-EMF) are used for wireless communication. Both types of non-ionising radiation are suspected to impair human health. Using epidemiological methods, including personal measurements, Swiss TPH experts scrutinise a variety of potential health consequences, ranging from tumours to sleep disturbances. The possible biological pathways of non-ionising radiation are elucidated by means of bioinformatics.