Conventional medicine works by needing a diagnosis of a condition first - this is done by various testing procedures etc. If they can't find anything then a diagnosis doesn't happen and neither does any treatment.

Homeopathy, in contrast, sees subjective symptoms as a most important expression of imbalance - i.e. what are you experiencing that makes you feel ill etc. If an individual picture of this imbalance can be determined then a prescription can be made - i.e. a homeopath doesn't have to wait until there are measurable physical changes - these physical changes are the results of disease - better to prescribe before this happens!!

I'm also curious as to what made you have the saliva test done in the first place? I'm presuming you had some symptoms - getting a clear picture of this would be a step to prescribing a remedy. Good luck in your search for better health.