Dr Linh N. Nguyen used to work in Hanoi, Vietnam as a clinician at the National Hospital for TB & Lung Disease and a medical officer, research officer for the National TB Programme, and in the South Pacific Region as a WHO technical advisor on TB and leprosy. Over the last 14 years, he has been working for the Global Tuberculosis Programme, World Health Organization in Geneva, Switzerland and currently as a medical officer working on TB treatment and care. Linh is experienced in TB and public health research, development of evidence-based health policy and guidance at the global and national levels, and provision of support to several countries on the implementation of TB and other health programmes. In addition to his publications as peer-reviewed articles and book chapters, he has engaged in the development of several WHO global guidance documents on TB, especially on treatment of drug-susceptible TB, treatment of drug-resistant TB, tuberculosis care and others.