1. A method comprising: providing a group of known biological samples, each known biological sample having an associated known outcome, said known outcome including a non-diseased sample or a diseased sample; obtaining a Raman data set from each known biological sample; analyzing each Raman data set to identify a diseased or non-diseased reference Raman data set depending on whether respective biological sample is said non-diseased sample or said diseased sample; generating a first database containing all diseased reference Raman data sets generating a second database containing all non-diseased reference Raman data sets; receiving a test Raman data set of a test biological sample having an unknown disease status; and providing a diagnostic of whether said test sample is a non-diseased sample or a diseased sample by comparing said test Raman data set against reference Raman data sets in said first and said second databases using a chemometric technique.