University of Sydney) Athena Siewierska The University of Sydney Australia Zoe Smith London School of Hygiene & Tropical Medicine, UK Marcel G. Speelman Utrecht University The Netherlands Marian Spengler Center for Vaccine Immunology, University of Innsbruck, Austria Karen K. Spreter New York University Medical Center, USA Laura Spriu University of Innsbruck, Austria Daniel Springman Duke University, USA Tania Sprano-Silva Center for Biotechnology and Biosciences, Portugal Viviana P. Sringole Yale University School of Medicine, USA Lena Struwe UCSF, USA Pilar Suárez-Cortés Institute of Neurosciences, CSIC/UAM, Spain Eva Sundqvist Karolinska Institute, Sweden Michael Surette McGill University, Canada Ludovic Tebbens University of Tübingen, Germany Baoqing Tian Umeå University, Sweden J. Paul Tice University of Alabama at Birmingham, USA Karl-Heinz Tietze Justus-Liebig-Universität, Germany Kathrin Tietze-Conus Justus-Liebig-Universität, Germany Jeroen T.M. de Vrieze National Institute for Public Health and the Environment (RIVM), The Netherlands Marcel Vera Universidade Federal do Rio de Janeiro, Brazil Silvia Varas-Godino Institut de Recherche pour le Développement, France Martin Wasmer Institut de Recherche en Immunologie et en Cancérologie, France Steffen Wasmuth Ulm University, Germany Heiko Weger-Lucarreta Ulm University, Germany Daniel Weiskopf University of Pennsylvania, USA Tammy West University of Connecticut Health Center, USA John Wherry University of California at San Francisco, USA John Wilkins University of Oxford, UK Stephen Withers University of Liverpool, UK Michael Wolfgang University of Regensburg, Germany Bernard Woo University of Southern California, USA Nigel Woodcock University of Birmingham, UK Susana Zacchino University of São Paulo, Brazil David Wojno Universidad Nacional de Cuyo, Argentina Stephen Wood University of Glasgow, UK Andrew Zajac Agriculture and Agri-Food Canada, Canada Oliver Zill Centre for Cancer Research and Cell Biology, Portugal We would like to acknowledge all our reviewers who, through their dedication to *Immunological Reviews* and the peer review process, helped to make *Immunological Reviews* the leading journal in the field. We thank Dr. S.J. Korthauer and the editorial team of the American Chemical Society, including Drs. Andrew C. Nagle and John J. Panek, for their support of *Immunological Reviews* as a member of the American Chemical Society\'s Advancing Biomedical Research program. Funding {#FPar1} ======= The authors would like to thank The University of Sydney for funding *Immunological Reviews*. Fiona E. McElduff is a University of Sydney Postgraduate Scholar and acknowledges the support of the Australian Government's Medical Research Future Fund (MRFF) program for funding *Immunological Reviews*. Availability of data and materials {#FPar2} ================================== Not applicable. About this supplement {#FPar3} ===================== This article has been published as part of *Immunological Reviews* Volume 23 Supplement 1, 2018: Current T cell assay standards - from technical platform to biological insights. The full contents of the supplement are available online at . Both authors contributed equally to the writing of this editorial. Both authors read and approved the final manuscript. Ethics approval and consent to participate {#FPar4} ========================================== Not applicable. Consent for publication {#FPar5} ======================= Not applicable. Competing interests {#FPar6} =================== The authors declare that they have no competing interests. Publisher's Note {#FPar7} ================ Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.