In 2011, the World Health Organization  classified radio frequency radiation of the type used by WiFi devices as a Group 2B possible carcinogen. A study conducted by the University of Vienna have found WiFi exposures to cause genotoxicity as they break single and double strand DNAs in our body. This indicates that there are effects that may potentially surface with our future generations.
Standard Wifi works on the 2,45Ghz frequency, you talk about microwaves from the frequency of 1Ghz or higher, below that they are called radiowaves (radiofrequency), so your statement is false. Your microwave works on 2,45Ghz as well, hence MICROWAVEs. Your Wifi-router, when not connected to a device still sends out pulses “Beacon Interval” which is on the default settings 10 pulses per second. An Eco-Router has the setting changed to 1 pulse per second, reducing exposure when it is idle. Many Wifi-routers with a 10/s Beacon Interval can give induced “Panic Attacks” to people who are sensitized to the High Frequency EMF.
You’ll find no shortage of articles on the dangers of just about anything if you look around the Internet. Articles about how dangerous modern medicines are, how dangerous cell phones are, how dangerous cooking your food in a microwave is, and yes, how dangerous Wi-Fi is. People claim that Wi-Fi routers keep them awake at night, cause cancer, cause hyperactivity in children, and all manner of unsupported and nonsensical claims.
Joel Moskowitz (@berkeleyprc) of the University of California, Berkeley School of Public Health, US, says: “This is the largest technological experiment in the history of our species, with potential health risks we still know next to nothing about.” This view is shared by Denis Henshaw, professor of human radiation effects at Bristol University, UK, who said: “Vast numbers of people are using cell phones and this could be a time bomb of health problems.”