JOHANNESBURG (TIP): Former South African President Nelson Mandela is “responding positively” to treatment for a recurring lung infection after being admitted to hospital on Wednesday night, the government said on Thursday. “He remains under treatment and observation in hospital,” it added in a statement, without giving further details about the health of the 94-year-old antiapartheid leader.

Mandela, who became South Africa’s first black president in 1994, has been mostly absent from the political scene for the past decade, but remains an enduring and beloved symbol of the struggle against racism.

He is renowned at home and abroad for spending 27 years in prison fighting the last bastion of white rule in Africa and then promoting the cause of racial reconciliation. “Black Americans look up to him because he fought oppression and his bravery is something that doesn’t happen often,” said Yau Williams, an American tourist, as he walked through Johannesburg’s financial district of Sandton. Mandela has been frail and in poor health for several years. “He will come out fine, let’s just have faith in God,” said Samson Ndlovu, speaking in Zulu as he walked out of a Johannesburg taxi rank. Mandela was in hospital briefly earlier this month for a check-up, and spent nearly three weeks in hospital in December with a lung infection and after surgery to remove gallstones.

That was his longest stay in hospital since his release from prison in 1990 after serving almost three decades for conspiring to overthrow the white-minority government.