Characteristics of Hospitalized Cases of Pertussis in Catalonia and Navarra, Two Regions in the North of Spain. oleh Inma Crespo, Diana Toledo, Núria Soldevila, Iolanda Jordán, Rubén Solano, Jesús Castilla, Joan A Caylà, Pere Godoy, Carmen Muñoz-Almagro, Ángela Domínguez, Working Group on the Transmission of Pertussis in Households