Interconnected clusters of invasive meningococcal disease due to Neisseria meningitidis serogroup C ST-11 (cc11), involving bisexuals and men who have sex with men, with discos and gay-venues hotspots of transmission, Tuscany, Italy, 2015 to 2016 Miglietta, Alessandro and Fazio, Cecilia and Neri, Arianna and Pezzotti, Patrizio and Innocenti, Francesco and Azzari, Chiara and Rossolini, Gian Maria and Moriondo, Maria and Nieddu, Francesco and Iannazzo, Stefania and D’Ancona, Fortunato and Maraglino, Francesco Paolo and Guerra, Raniero and Rezza, Giovanni and Voller, Fabio and Stefanelli, Paola, Eurosurveillance, 23, 1700636 (2018), https://doi.org/10.2807/1560-7917.ES.2018.23.34.1700636