He's on the mend.

他的病见好了。

《新英汉大辞典》

His family has said he's on the mend.

NPR: Retired Detective Defends Record In NYC Case

But the city's longest serving mayor told the crowd that he is on the mend.

NPR: Boston Mayor Announces He Won't Seek Re-Election

In an interview broadcast on Saturday but recorded a day earlier, the ANC's newly elected Deputy President Cyril Ramaphosa said he believed Mandela was "on the mend".

FORBES: Cyril Ramaphosa