Hi Narek,
This is an excellent question, that most of us have asked at one point. There is much conflicting information regarding the Health effects of "Wireless". It is good to be well versed on the subject and to realize that the bottom line truly is that this had not been studied for a long enough time frame for anyone to know the absolute truth. Here are some good example Pro/Con type articles;
"There is currently insufficient scientific basis for concluding either that wireless communication technologies are safe or that they pose a risk to millions of users.... FCC radio frequency radiation guidelines are based on protection from acute injury from thermal effects of RFR exposure and may not be protective against any non-thermal effects of chronic exposures."
U.S. Food and Drug Administration, February 2000
http://www.energyfields.org/science.html
Cisco Aironet 1200 Series
Wireless Systems and RF Safety Issues
This document discusses the results of research into the possible health effects of RF devices.
http://www.cisco.com/en/US/products/hw/wireless/ps430/products_white_paper09186a0080088791.shtml
All Cisco and Linksys wireless products are evaluated to ensure that they conform to the RF emissions safety limits adopted by agencies in the United States and around the world. These evaluations are in accordance with the various regulations and guidelines adopted or recommended by the Federal Communications Commission (FCC)* and other worldwide agencies**.
Compliance for these devices is typically based on the Maximum Permissible Exposure (MPE) levels for mobile or fixed devices*** or per Specific Absorption Rate (SAR) tests for portable**** devices. Depending on the type of product, compliance is based on modeling, technical analysis, or RF measurement testing. The analysis or testing is performed in accordance with the various national and international standards adopted by independent third-party accredited labs.
Before any wireless device can be placed on the market, Cisco submits MPE technical analysis or SAR test data results to the appropriate agencies for review. These studies and test reports must demonstrate that the devices meet the RF emissions safety limits, or they cannot be placed on the market. Cisco and Linksys make sure that all of their products adhere to the stricter standards imposed by the worst case-the uncontrolled environment that imposes the tightest compliance limits.
World Health Organization - Electromagnetic fields and public health
http://www.who.int/mediacentre/factsheets/fs304/en/index.html
Canadian university says no to WiFi over health concerns
http://arstechnica.com/news.ars/post/20060222-6235.html
Health fears lead schools to dismantle wireless networks
http://www.timesonline.co.uk/tol/life_and_style/education/article642575.ece
Hope this helps!
Rob
FWIW - We do have a large wireless deployment on our campus.
