The Union South-East Asia Office in Delhi is The Union's largest region office. USEA works with all scientific departments to implement grants, trainings and technical support programmes with a major focus on TB and tobacco control.

Working in Bangladesh, India, Indonesia and other countries through a network of consultants and strong partnerships with governments, civil society, corporations and international agencies, USEA brings global expertise to Union services in the region. Since 2010, a major civil society TB control project funded by The Global Fund is being managed by a dedicated team from the office, which also houses the Secretariats of the WHO sub-group on TB & Poverty and a civil society Partnership for TB Care and Control in India.