Nothing at all, and not even a little. Which I was hoping that could be repaired to no avail. It is due to the Olfactory nerve being totally severed. Located in the middle of ones forehead, attached to the brain I am told. For if that takes place, I am told that those senses could come back as the nerves re-route around the damaged area.
Nerves grow at a certain rate, slowly.
The nerves would have grown, and re-routing by now, if they were only partially cut. My hearing is now an amazing attribute. I can hear anything almost. Thankfully my vision is not anymore damaged then before. I have a stigmatism.