I've heard that WIFI signals have side effects on the body and can interfere with sleep. And may cause cancer. So is there a way to stop the wireless signal?
Whether WIFI will be harmful to humans remains to be seen. However, if you want to block wireless signals, consider using a WIFI jammer. Such devices can jam wi-fi, bluetooth and other signals. When you open it, you can quickly block the relevant signals, so you don't have to worry about be WIFI radiation.