Letter to the editor: importance of a careful investigation to avoid attributing Legionnaires’ disease cases to an incorrect source of infection Rota, Maria Cristina and Scaturro, Maria and Ricci, Maria Luisa, Eurosurveillance, 25, 2001484 (2020), https://doi.org/10.2807/1560-7917.ES.2020.25.34.2001484