The following symptoms have been reported by children who are at schools with Wi-Fi in them:

Headaches (caused by the heating of the water in the child's brain by the microwaves passing through their heads)

Racing heart rate

Skin rashes

Insomnia

Hyperactivity - especially in children not previously known to be hyperactive

Memory loss

Attention deficit - children have trouble concentrating in class

Dizziness

Nausea

Vertigo

Unexplained night sweats, lasting several nights and unrelated to any fever

You cannot see, feel, taste, hear or see the radiation but just like unseen bacteria it can still be harmful