NEW : President Jacob Zuma says it 's doctors ` ` are doing a good job '' Last year , he spent the Christmas holidays undergoing treatment for a lung infection and gallstones , one of his longest hospital stays since his release from prison in 1990 . Mandela has not appeared in public since South Africa hosted the World Cup in 2010 . He has been in and out of hospital in recent years . His daughter has flown back to be with him .
NEW : President Jacob Zuma says it 's doctors ` ` are doing a good job '' Mandela has not appeared in public since South Africa hosted the World Cup in 2010 . He has been in and out of hospital in recent years . His daughter has flown back to be with him .