Sulfuric Acid Inhalation?

I work in a chemistry lab at work, and we titrate with 50% sulfuric acid. Sometimes, we drop a fews drops of this acid on the burner. The burner, of course, causes the acid to smoke. Will breathing this smoke cause any harm? I know that it is a very small amount, but I was just wandering. Obviously, I don't know how much of a chemical is too much.