Nelson Mandela's daughter has confirmed the civil rights icon is making good progress in his health battle after spending more than two months in hospital.

The ailing former South African leader has been under the care of doctors in Pretoria since 8 June (13), battling a recurring lung infection, and his daughter Zindzi has now given an update on the 95 year old's condition.

Zindzi reveals his health is improving everyday, and she has praised her famous father's strength, telling South African state broadcaster Sabc, "He's fine. Tata (father) now manages to sit up, like now he sits up in a chair for a few minutes in a day, every day you know he becomes more alert and responsive. Tata is determined not to go anywhere anytime soon, I cannot stress this enough. He just doesn't have the strength of a man, he has the strength that is beyond anything that can be explained. Because even now with the challenges to his health, he somehow manages to bounce back when everyone assumes this is the end."