The 5G technology will increase the current exposure of the population to radiofrequency electromagnetic fields due to the inevitable installation of a very large number of intelligent antennas, both outside and inside buildings. Numerous scientific publications have found an association between harmful effects on health and exposure to radiofrequency electromagnetic fields (EMF). This book analyzes the changes that the new 5G technology will bring and details the different studies that confirm the health problems related to EMF radiation exposure.