I live in a hostel. Today there were lots of ants in the floor of my room. So the cleaning man came and he mixed some insecticide/poison chemical to a mug of water and killed the ants. In the meantime I was eating my food in my room. It was a bad smell and I quickly ate my food. Some of the smell/vapour of the insecticide/poison may have entered my stomach through the air. But there was no direct contact with the insecticide, I was away from it. I have heard that insecticide liquid vapour damages brain and nervous system. Will anything happen to me? Will it harm me in anyway?