[member="Amelia Deathman"]
It's less a question of Force detection and more a question of the mundane. As a medical professional, I can clearly state that it is very easy, child's play even, to discover ailments, mind altering drugs, pharmaceuticals, and even dietary evidence from even something as basic as a blood sample. Any and all viruses, nanites, etc. would require a medium to move throughout the body, meaning usage of the blood stream, in whole or in part, to move the affliction is necessary. The Force has no real weight in detection of something so simple as the common cold, but a medical doctor or even a nurse or technician could discover such a thing with ease and speed. Your enemy in such a case is less the Jedi or the Sith or the neutral Force users, but the average doctor with knowledge and experience.
To summarize: You're seemingly attempting to slip something past Yoda when you should be more concerned about Sherlock Holmes rummaging through your things in the background.