Cocirculation of Hajj and non-Hajj strains among serogroup W meningococci in Italy, 2000 to 2016 Fazio, Cecilia and Neri, Arianna and Vacca, Paola and Ciammaruconi, Andrea and Arghittu, Milena and Barbui, Anna Maria and Vocale, Caterina and Bernaschi, Paola and Isola, Patrizia and Galanti, Irene Alessandra and Mencacci, Antonella and De Nittis, Rosella and Chironna, Maria and Giammanco, Anna and Pagani, Elisabetta and Bisbano, Alessandro and Stefanelli, Paola, Eurosurveillance, 24, 1800183 (2019), https://doi.org/10.2807/1560-7917.ES.2019.24.4.1800183