RT Journal A1 Voelker R T1 LEaders warn of deadly hiv, tb collision JF JAMA JO JAMA YR 2008 FD August 6 VO 300 IS 5 SP 491 OP 492 DO 10.1001/jama.300.5.491 UL http://dx.doi.org/10.1001/jama.300.5.491 AB “Earlier this year, WHO released a report indicating that multidrug-resistant TB has reached the highest levels ever recorded,” said Chan. “Even more ominous is the emergence of extensively drug-resistant TB [XDR-TB], which is virtually impossible to treat.” Chan said any further spread of XDR-TB would be a setback “of epic proportions” in global efforts to control the spread of TB and HIV.