Norwegian Institute of Public Health, Norwegian Institute of Public HealthNorwegian Institute of Public Health - Division of Infection Control and Environmental Health, Norwegian Institute of Public Health, Norwegian Institute of Public Health, Haukeland University Hospital- Department of Anesthesia and Intensive Care, Norwegian Institute of Public Health, Norwegian Institute of Public Health, Norwegian Institute of Public Health - Department of Virology, Norwegian Institute of Public Health - Department of Virology, Norwegian Institute of Public Health, Haukeland University Hospital- Department of Anesthesia and Intensive Care, Norwegian Institute of Public Health, Norwegian Institute of Public Health, Norwegian Institute of Public Health, Norwegian Institute of Public Health - Department of Infection control and Preparedness and Norwegian Institute of Public Health

Norwegian Institute of Public Health - Department of Virology, Haukeland University - Department of Microbiology, affiliation not provided to SSRN, University of Bergen - Haukeland University Hospital, University of Bergen - Haukeland University Hospital, Norwegian Institute of Public Health, Norwegian Institute of Public Health, affiliation not provided to SSRN, Norwegian Institute of Public Health - Department of Virology and Norwegian Institute of Public Health - Department of Virology