A recent study  led by author Renato Zenobi of the Swiss Federal Institute of Technology (ETH) in Zurich has revealed that: Exhaled breath is as unique for an individual as fingerprints.
Unique metabolites found in everyone’s exhaled breath can be used as a unique and non-invasive fingerprinting mechanism.
How it can be a helpful discovery?

• Doctors will be able to detect illnesses such as a lung infection to stomach cancer.
• Exhaled breath can be as useful to medical diagnosis as those found in urine or blood.
• Being non-invasive and the results are instantaneous, a breath test could also be used in anaesthesia or doping tests.
• Could be now used to check the appropriate dose for a patient undergoing an anaesthetic.