Originally Posted by
RichardKenner
But this ignores the fact that traces aren't dangerous: only the chemicals themselves are. Wider use of trace detection will cause yet more "false" positive (in quotes because the trace exists, but not enough to be a danger).
False positives with trace chemical detection will happen if the sensitivity and specificity of the technique adopted are not properly adapted. These are certainly aspects that need work. But they are aspects that can be worked on, because the basic methodological approach is correct. Whole body scanning, on the other hand, is "unfixable".