The senior author of the study being publicised is Prof Michael Snyder, head of genetics at Stanford.
Snyder has a big reputation, and is also a member of Ron Davis' ME research advisory board.
Using the "wearable sensors" being studied, Snyder realised some of his vital signs were deviating subtely from nornal, following a visit to Massechusets. This led to him correctly diagnosing his own Lyme disease, at a very early stage, and then treating it promptly.
This technology, once validated, obviously has many potential applications in identifying variations in a person's physiological functioning.
Eg It could be applied to (objectively) identify and quantify health fluctuations in ME - including PEM.