Investigation
Do smart meters cause cancer or recurring headaches through radiofrequency (RF) emissions?
Addison et al. 2023 directly measured three UK Zigbee smart-meter systems in a controlled laboratory; 868-MHz system components gave maximum six-minute average 0.1 mW/m² and <2.8% duty factor against their specified ICNIRP 1998 (NOT 2020) reference. These component/device data do not measure disease.