Read some of the papers on PubMed that are highlighting the dangers of WiFi radiation, above and beyond others. 

Consider why some of the shrewdest businesspeople in the world (the Lloyds names) are leaving a huge potential market on the table (estimated at USD3 Trillion).   The answer?  They don't want to be wiped out the way they almost were a couple of decades ago with asbestos claims, among others.

My neurologist went a very pale shade of white when I mentioned trouble after being exposed to WiFi at close quarters.   Very, very pale.   After a bit of a burst in papers looking at the neurological effects of WiFi and other EMFs on neurological disease (where there was an effect shown), the literature has gone strangely silent over the past year or so.

A reason why the use of laptops on flights inside and outside the US is being banned?  Huge amounts of EMFs inside a plane that is already being subjected to atmospheric radiation is a huge risk to crew and frequent travelers.