Note that he said "on a path".
The "path" most likely involves a method for filtration into different components (separated by size and potentially other chemical means), a means of testing whether the components have any noteworthy effects on healthy cells and then using various means of characterisation to discover what the active factor(s) are (which could also involve more filtration).
Mitochondrial fragmentation should not be assumed to be a negative adaptation, see:
"Physiological Mitochondrial Fragmentation Is a Normal Cardiac Adaptation to Increased Energy Demand."
Aside, this is the context of Prusty's "sncRNA-U14" research:
"HHV-6 encoded small non-coding RNAs define an intermediate and early stage in viral reactivation"