Reactive vaccination as control strategy for an outbreak of invasive meningococcal disease caused by Neisseria meningitidis C:P1.5-1,10-8:F3-6:ST-11(cc11), Bergamo province, Italy, December 2019 to January 2020 Fazio, Cecilia and Daprai, Laura and Neri, Arianna and Tirani, Marcello and Vacca, Paola and Arghittu, Milena and Ambrosio, Luigina and Cereda, Danilo and Gramegna, Maria and Palmieri, Annapina and Carannante, Anna and Bertoli, Maria Rosa and Crottogini, Lucia and Gennati, Giorgio and Quinz, Eugenia and Trezzi, Livia and Ciammaruconi, Andrea and Fillo, Silvia and Fortunato, Antonella and Rezza, Giovanni and Lista, Florigio and Stefanelli, Paola, Eurosurveillance, 27, 2100919 (2022), https://doi.org/10.2807/1560-7917.ES.2022.27.24.2100919