Yes. They are all at different levels. It depends on the frequency. Again, it depends on the characteristics of propagation. For microwave or other frequencies, you should also know that these waves are reflected or absorbed by materials.
It involves the attenuation of a signal. If we are talking about extremely low frequency fields, then these fields can penetrate. That is the issue for all TV monitors. Of course, those are issues of concern and some steps even should be taken by users. I personally am of the opinion that the usage of mobile phones should be reduced or the position on the head should change from side to side. This is a source of energy that's very close to your head.
But I am not of the opinion, for example, that exposure limits should be reduced. These are precautionary steps taken by individuals. Again, I am of the opinion that the usage of mobile phones by children should be limited, not only for health concerns, but for habit concerns.
So it depends for the usage of microwave or other sources of energy.
I think you have more comments on this, Dr. Muc.