Affiliation: | Author affiliations: Institut Pasteur, Paris, France (M.-L. Quilici);;Centre Pasteur Cameroun, Garoua, Cameroon (D. Massenet, B. Gake);;State Epidemiologic Unit, Yola, Adamawa State, Nigeria (B. Bwalki);;Doctors Without Borders/Médecins Sans Frontières, New York, New York, USA (D. M. Olson) |