RF in general are never good to any living things (including humans), that's because you are propagating some medium to get a signal across. Just think of the tin can and string sceniro, except you are now making the medium be your head and the air, while the output power/propagation effect (how fast the string is resonating - the can and string sceniro) be micro scale which means resonances in cell levels. As a result, I think any common sense would solve the rest of the questions..
RF in general are never good to any living things (including humans), that's because you are propagating some medium to get a signal across. Just think of the tin can and string sceniro, except you are now making the medium be your head and the air, while the output power/propagation effect (how fast the string is resonating - the can and string sceniro) be micro scale which means resonances in cell levels. As a result, I think any common sense would solve the rest of the questions..