radiation?

good day

I wonder if you need to have a minimum distance of safety for the receiving antenna because of the radiation that can emit.

Or 49dbi is secure even when the computer at 2 meters?

And if the antenna I have at home is relatively small because the reason 8 or 9 dbi not catch anything but 49dbi picks?

Supposedly if the antenna is maximum 4 or 5dbi should take the 49dbi?

Thanks