While efforts were being made to strengthen South Africa against any eventuality in the event of an Ebola virus outbreak, with the government mobilising task teams and preparing hospitals to treat infected people, the country remained under siege from more pressing diseases, experts said yesterday... They said HIV-AIDS was still a real threat, while the extreme drug-resistant (XDR) tuberculosis virus continued to ravage the sick in communities... "Someone dies from XDR TB every four minutes," the University of Pretoria's Dr Andrew Medina-Marino said.