Mucosal-Associated Invariant T Cells are not susceptible in vitro to SARS-CoV-2 infection but accumulate into the lungs of COVID-19 patients.

"Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper."

"The samples used for the study were obtained from Helsinki University Hospital, Helsinki, Finland. We thank all the participants in this study. We also thank the excellent technical assistance of laboratory technicians Marjo K. Rissanen, Tamas S. Bazsinka, Sanna Mäki and Kristiina Nokelainen. We acknowledge Simo Miettinen for organising COVID-19 blood sample collection. This study is funded by The Finnish Medical Foundation, Sigrid Juselius Foundation and the 10.13039/501100002341Academy of Finland (Grant No's. 1336490, 336439 and 335527). Open access was funded by University of Helsinki Library. The funders of the study had no role in study design, data collection, data analysis, or writing of the report. Xiaobo Huang: Conceptualization, Methodology, Validation, Formal analysis, Investigation, Data curation, Writing – original draft, Writing – review & editing, Visualization. Jonas Kantonen: Conceptualization, Methodology, Investigation, Resources, Writing – review & editing, Visualization. Kirsten Nowlan: Conceptualization, Methodology, Validation, Investigation, Writing – review & editing. Ngoc Anh Nguyen: Investigation, Writing – review & editing. Suvi T. Jokiranta: Investigation, Writing – review & editing. Suvi Kuivanen: Methodology, Validation, Investigation, Writing – review & editing. Nelli Heikkilä: Methodology, Validation, Formal analysis, Investigation, Writing – review & editing. Shamita Mahzabin: Conceptualization, Methodology, Investigation, Writing – review & editing. Anu Kantele: Conceptualization, Resources, Writing – review & editing, Supervision, Project administration, Funding acquisition. Olli Vapalahti: Resources, Writing – review & editing, Supervision, Project administration, Funding acquisition. Liisa Myllykangas: Conceptualization, Writing – review & editing, Supervision, Project administration, Funding acquisition. Santtu Heinonen: Investigation, Writing – review & editing. Mikko I. Mäyränpää: Conceptualization, Methodology, Resources, Writing – review & editing, Supervision, Project administration, Funding acquisition. Tomas Strandin: Conceptualization, Methodology, Formal analysis, Resources, Data curation, Writing – review & editing, Supervision, Project administration. Eliisa Kekäläinen: Conceptualization, Resources, Writing – review & editing, Supervision, Project administration, Funding acquisition."