While part of his brain monitored the sensor readings, Data started working on plausible mechanisms for disrupting the scans.
The most plausible mechanism, to a physicist, is called the Doppler effect.
So there's no biologically plausible mechanism by which these products can directly influence the body.
These may be the result of suggestion, but adverse conditioning is an entirely plausible further mechanism.
More is known about the process of integration in bacterial cells, and a plausible mechanism has been constructed.
"But there's no medical or plausible mechanism by which it affects the disease process."
The complete proof of a concept generally requires a plausible mechanism that could mediate the effect.
Here's an idea: come up with a plausible mechanism and design an experiment to detect whether that mechanism is operating or not.
Looking for a plausible mechanism is slightly easier, but the search has only just begun, and there are few clues to go on at present.
However, there is no plausible mechanism for such an impairment.