If you are one of the approx 16% of the population unable to clear mold toxins from your body, the mold toxins can persist and keep you sick for decades after the end of any exposure to moldy environments.
I see that they're saying 24% of the population, not the 1-in-6 I recall reading from some other source. Also, I seem to have been wrong about the test's needed to be ordered by a doctor (except in Pennsylvania).
If you aren't chronically ill, I don't think you need do anything. There is a blood test for whether you can detox mold toxins, but a doctor would need to order it, and, e.g., Medicare would not pay for it.