Abstract: A sample (e.g. saliva and/or blood) may be takes from a test subject (e.g. a human patient). The sample may be processes to extract a testable substance. The testable substance may be processed by a mass spectrometer in order to generate a mass spectrometry profile of the sample. If the sample includes an infectious disease, then the infectious disease may be reflected in the mass spectrometry profile. The mass spectrometry profile may be compared to a database of mass spectrometry profiles from samples of test subjects whom have already be diagnoses with a particular infectious disease. If the mass spectrometry profile of the test subject being diagnosed is substantially similar to one or more mass spectrometry profiles in the predetermined database, then a diagnosis of an infection disease may be made in an accurate, efficient, and time sensitive manner.