title: Reply to Abu Raya et al.
authors.affiliation: Center for Vaccinology and Neonatal Immunology, Department of Pediatrics and Pathology-Immunology Department of Neonatology and Pediatric Intensive Care, Children's Hospital of Geneva.
authors.forename: Christiane S
authors.initials: CS
authors.lastname: Eberhardt
authors.affiliation: Department of Gynecology and Obstetrics.
authors.forename: Begoña
authors.initials: B
authors.lastname: Martinez de Tejada
authors.affiliation: Center for Vaccinology and Neonatal Immunology, Department of Pediatrics and Pathology-Immunology Department of Pediatrics, Children's Hospital of Geneva, University Hospitals of Geneva and Faculty of Medicine, Switzerland.
authors.forename: Claire-Anne
authors.initials: CA
authors.lastname: Siegrist