If you have looked into this issue of man made frequencies causing biological effects including cancer clusters around cell phone masts you have been warned. Similar to Petro companies producing climate denier 'science', there are phone companies denying electro health concerns.
The absorption rate of microwaves is based on military personnel.
In Europe and Australia, it is 2, in the US it is 1.6 - and that only measures the brain tissue heating effects. An 8 year old skull is much thinner than adult military personnel and is far more affected.
IMO we do not know the full effects.

There are mitigating measures you can do such as taking melatonin to help heal damage by removing free radicles.