Acknowledgement
We acknowledge the support to our work on Treg function in TB by a Centre of Excellence grant to AV from the Department of Biotechnology, Govt. of India (No BT/PR10394/MED/29/1128/2016). We acknowledge additional funding for sample collection and analysis by EC HORIZON2020 TBVAC2020 and EC FP7 EURIPRED (FP7-INFRA-2012 Grant Agreement No. 312661) to AV. We also wish to thank Dr. Srabanti Rakshit for careful reading and editing of the review.