Susmita Chatterjee is an economist by training. Her research interests include costing of health services, economic burden studies, health financing, and economic evaluations. She led several immunization costing studies in India such as delivery cost of routine immunization programme, incremental cost of improving routine immunization coverage, cost of conducting measles-rubella vaccination campaign, return-on-investment of an immunization cold chain intervention and costing and financing of India’s comprehensive multi-year plan for immunization (2013-17 and 2018-2022). She is one of the authors of the ‘Costing of Health Services for Provider Payment: A Practical Manual’ and ‘Handbook of Applied Health Economics in Vaccines’.