Acknowledgements
The authors gratefully acknowledge all members of the clinical and data management teams for their hard work under short timelines and for the constructive discussions. This project was part of the EDCTP2 programme supported by the European Union (grant number RIA2020EF-2968-Re-BCG-CoV-19). The computations were enabled by resources in project SNIC2020-5-524 provided by the Swedish National Infrastructure for Computing (SNIC) at UPPMAX, partially funded by the Swedish Research Council through grant agreement no. 2018-05973.