Wi-Fi sends data via electromagnetic radiation, a type of energy. The radiation creates areas called electromagnetic fields (EMFs). There's concern that the radiation from Wi-Fi causes health issues like cancer. But there are currently no known health risks in humans.

Does WiFi expose radiation?

The RF signals from cell phones, as well as Bluetooth and WiFi, are considered nonionizing forms of radiation.

Is it safe to sleep beside a WiFi router?

Tech reporter Vincent Chang answers. It is safe to sleep next to a wireless router as it produces radio waves that, unlike X-rays or gamma rays, do not break chemical bonds or cause ionisation in humans. In other words, radio waves do not damage the DNA of human cells. Damaged DNA can lead to cancer.