Former president Nelson Mandela is making “slow but steady” progress back to health, although he remains critically ill, the office of the president says. The 95-year-old former president and anti-apartheid icon has been in hospital for more than two months with a recurring lung infection. “Former president Nelson Mandela continues to receive treatment in a Pretoria hospital and doctors have indicated to President Jacob Zuma that Madiba is making a slow but steady improvement,” a statement from the presidency said. “The medical team also reiterated that although his health was improving steadily, Madiba still remained in a critical condition,” it added. Zuma asked South Africans to keep on praying for Mandela’s recovery and good health, the statement said. Mandela’s youngest daughter Zindzi said on Friday that her father was “not going anywhere anytime soon” and was now able to sit up without help. He was “more alert, more responsive,” she said.