The Right Chemistry: Diagnosing disease by scent

We spew out chemicals. Hundreds of compounds have been identified in our breath and in our sweat, with the exact composition varying with our personal biochemistry, our diet, state of health, emotional situation and the bacteria we harbour. Can some practical information be teased out of our “odourprint?” Is it possible to diagnose disease by scent, scientists wonder? In some cases, the answer is yes.
Although tuberculosis is no longer the scourge it once was, the disease still kills