We already know certain proteins increase in number when the immune system needs to defend itself against certain attacks. Such examples include inflammatory proteins, immunoglobulins etc. These changes are often detectable long before symptoms appear.
The Proteomis profile uses another method to analyze the serum proteins. Thanks to this profiling, organic as well as functional changes are detected. The result is a more finely-tuned, individually-based analysis of the overall biological status of the patient.