1 Assistance Publique - Hôpitaux de Paris, Pediatric Emergency Department, Necker-Enfants Malades University Hospital, Université de Paris, Paris, France.
2 INSERM, Centre de Recherche des Cordeliers, UMRS 1138, Sorbonne Université, Université de Paris, Paris, France.
3 Assistance Publique-Hôpitaux de Paris, Department of general pediatrics, pediatric infectious disease and internal medicine, Robert Debré university hospital, Université de Paris, Paris, France.
4 Assistance Publique-Hôpitaux de Paris, Clinical epidemiology unit, Robert Debré university hospital, ECEVE INSERM UMR 1123, Université de Paris, Paris, France.
5 ACTIV, Association Clinique et Thérapeutique Infantile du Val-de-Marne, Créteil, France.
6 Assistance Publique - Hôpitaux de Paris, Pediatric Department, Antoine Béclère University hospital, Université de Paris Saclay, Clamart, France.
7 Centre for Research in Epidemiology and Population Health, INSERM UMR1018, Villejuif, France.
8 Assistance Publique-Hôpitaux de Paris, Strategy and Transformation Management Department - Emergencies and Intensive Cares, Paris, France.
9 Assistance Publique-Hôpitaux de Paris, Patient Quality Medical Organisation Departement - Health Crisis Management, Paris France.
10 Assistance Publique-Hôpitaux de Paris, Department of Clinical Microbiology, Necker-Enfants Malades University Hospital, Université de Paris, Paris, France.
11 INSERM U1151-Equipe 11, Institut Necker-Enfants Malades, Université de Paris, Paris, France.
12 Division of Infectious Diseases, Harvard Medical School, Boston, Massachusetts, United States of America.