WHO says no significant effect...
Like you I worried about this as I have wireless internet and the box is in my Dd´s room (due to positioning of the receiving box on the outside of the house), so I did my research. Here´s one thing among many which says there is no provable health risk.http://www.who.int/mediacentre/facts.../en/index.html
If you can´t be bothered to read the whole thing, it concludes....Considering the very low exposure levels and research results collected to date, there is no convincing scientific evidence that the weak RF signals from base stations and wireless networks cause adverse health effects.
I also heard it put more plainly on the BBC, that a year´s exposure to Wi-Fi was equivalent to 20 minutes on a cell phone.
Love, Sadystar x.