1 European Centre for Disease Prevention and Control, Gustav III:s boulevard 40, 169 73, Solna, Sweden. diamantis.plachouras@ecdc.europa.eu.
2 Clinical Research Unit, Critical Care, Lyon Sud University Hospital, Hospices Civils de Lyon, Lyon, France.
3 Laboratory of Emerging Pathogens, International Center for Infectiology Research (CIRI), Inserm U1111 CNRS, UMR5308, ENS de Lyon, UCBL1, Lyon, France.
4 European Centre for Disease Prevention and Control, Gustav III:s boulevard 40, 169 73, Solna, Sweden.