JOHANNESBURG, Dec 24: Former South African president and anti-apartheid hero Nelson Mandela, who is 94, continues to respond to treatment two weeks after being taken to hospital, the government said on Saturday. The Nobel Peace laureate, who has been treated for a lung infection and gallstones after being hospitalized on December 8, was visited by South African President Jacob Zuma, presidency spokesman Mac Maharaj said in a statement. (agencies)