Health Risks from Wi-FiWi-Fi transmits radio signals in the same general frequency range as microwave ovens. Yet compared to ovens and even cell phones, wireless network cards and access points transmit at much lower power. WLANs also send radio signals only intermittently, during data transmission, whereas cell phones transmit continuously while powered on. Overall, the average person's cumulative exposure to microwave radiation from Wi-Fi is much, much less than exposure from other radio frequency devices.
Schools have nonetheless remained concerned about the health risks of wireless networks on children. A few schools have banned or limited the use of Wi-Fi as a safety precaution:
- Ballinderry Primary (UK) Decides to Shut Off Wi-Fi (2008)
- Lakehead University Restricts Deployment of Wi-Fi on Campus (2006)