The paper linked to in the article doesn't go into detail on that, but does say "Six months after surgery (3 months after ceasing dexamethasone) [...] Neuropsyc

The paper linked to in the article doesn't go into detail on that, but does say "Six months after surgery (3 months after ceasing dexamethasone) [...] Neuropsychiatric symptoms had improved but persisted" https://wwwnc.cdc.gov/eid/article/29/9/23-0351_article https://wwwnc.cdc.gov/eid/article/29/9/23-0351_article