久病

suffer from a longterm illness; be chronically ill

之后

later; after; afterwards; thereafter; subsequently; subsequent; following

逐渐

gradually; progressively; increasingly; gradual; stepwise; little by little; bit by bit; step by step; by degrees

康复

recovery; healing; rehab; rehabilitation; convalescence; recuperation; recover; convalesce; rehabilitate; recuperate; heal; do well; restore; revive; mend revitalize; get over; improve; come through; pull through; better; recovered; rehabilitated; convalescent; on your feet; in the land of the living; on the mend