Long-term influenza antibodies profiles in previously vaccinated and non-vaccinated adults oleh Iván Sanz-Muñoz, Conrado Lajara, Javier Sánchez-Martínez, Camino Prada-García, Silvia Rojo-Rello, Marta Domínguez-Gil, Virginia Fernández-Espinilla, Cristina Hernán-García, José M. Eiros-Bachiller, Asunción Caminero-Pérez, Yolanda Marcos-López, Luis Teso-Fernández, José Ignacio Echarren, Javier Castrodeza-Sanz, José M. Eiros