Immune response and reactogenicity after immunization with two-doses of an experimental COVID-19 vaccine (CVnCOV) followed by a third-fourth shot with a standard mRNA vaccine (BNT1... oleh Ana Ascaso-del-Rio, Javier García-Pérez, Mayte Pérez-Olmeda, Eunate Arana-Arri, Itziar Vergara, Carla Pérez-Ingidua, Mercedes Bermejo, María Castillo de la Osa, Natale Imaz-Ayo, Ioana Riaño Fernández, Oliver Astasio González, Francisco Díez-Fuertes, Susana Meijide, Julio Arrizabalaga, Lourdes Hernández Gutiérrez, Humberto Erick de la Torre-Tarazona, Alberto Mariano Lázaro, Emilio Vargas-Castrillón, José Alcamí, Antonio Portolés