Does wifi have any effect on health in home?
Compared to holding a mobile phone against your head, the exposure levels are very low.
So, even if non-ionizing radiation is found to be a health concern in the future (current studies show no reason for concern), wifi isn't going to be the primary source of exposure for most people.
If you are concerned, locate your router somewhere other than directly next to a desk.
Some router configuration software also allows you to set the transmit power level, so you can lower the power levels to a place where you still get acceptable bandwidth in the areas of the house where you use wifi.
There is no detectable effect.
In double blind studies where people who claim to be sensitive to electric fields have tried to detect whether a wi-fi source is on or off their results have been no better than chance.
What does affect their health is their anxiety over possible health effects. This isn't to belittle that as anxiety can cause real health problems, so anything you can do to reduce the anxiety is worth the effort.