>> But the article does very little to study if these changes actually effect people and for how long. The higher bilateral gray matter volumes (GMV) in olfact

>> But the article does very little to study if these changes actually effect people and for how long. The higher bilateral gray matter volumes (GMV) in olfactory cortices, hippocampi, insulas, left Rolandic operculum would have long-term consequences which are indeed what it means: "long-term" i.e. too short to see physical manifestations of the impact in this study. But these changes in the brain are in itself horrifying given that the symptoms only manifest as respiratory and so on.