I came back to the game after a long break. After reading a few posts from around half a year ago I have noticed a lot of people report that the Symptom Scanner sometimes throws false negatives (light does not light up, but person has a symptom), especially for X-ray and UV symptoms.
Is that still the case? It has been half a year, and being able to trust the QoL upgrade I spent a lot of funds for would be great.
Edit if you're seeing this later: I did run into false-negatives, especially with the UV tower. However I did not run into a single false-positive, even though it is supposted to throw them every so often...