1 Division of Infectious Diseases and Tropical Medicine, University Hospital, Ludwig-Maximilians-University (LMU), Leopoldstrasse 5, 80802, Munich, Germany. martin.alberer@lrz.uni-muenchen.de.
2 Division of Paediatric Infectious Diseases, Dr. von Hauner Children's Hospital, University Hospital, Ludwig-Maximilians-University (LMU), Lindwurmstraße 4, 80337, Munich, Germany.