1. Virus and Immunity Unit, Department of Virology; and Laboratory of Humoral Response to Pathogens, Department of Immunology; Institut Pasteur, 75015 Paris, France
2. Centre National de la Recherche Scientifique, URA3015, 75015 Paris, France
3. Université Paris Diderot, Sorbonne Paris Cité, Cellule Pasteur, 75015 Paris, France
4. Laboratory of Molecular Immunology and Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10065
5. Centre National de la Recherche Scientifique, URA1961, 75015 Paris, France