If Our Eyes Could See Wireless Signals, They Wouldn’t Look Like This

What is the current state of medical science on this topic? It obviously looks very scary to the layman to see their space being blasted by invisible waves like this, but have we found any evidence that there is short/long-term impact on our bodies, brains, etc.?

Articles like this[1] on electrosensitivity definitely make me raise my eyebrow and think "what haven't we realized about this yet?"

[1] http://www.theguardian.com/technology/2015/jun/21/the-town-t...