Executive summary. Diagnosis, treatment and prophylaxis of influenza virus infection. Consensus statement of the Spanish Society of Infectious Diseases and Clinical Microbiology (SEIMC), the Spanish Society of Pediatric Infectious Diseases (SEIP), the Spanish Association of Vaccinology (AEV), the Spanish Society of Family and Community Medicine (SEMFYC) and the Spanish Society of Preventive Medicine, Public Health and Health Management (SEMPSPGS) Francisco López-Medrano; Santiago Alfayate; Jordi Carratalà; Judith Chamorro-Camazón; Elisa Cordero; Marta Cruz-Cañete; María Fernández-Prada; Manuel García-Cenoz; María Ángeles Marcos; Santiago Melón; Nemesio Moreno-Millán; María Ángeles Onieva-García; Raúl Ortiz de Lejarazu; Jaime Jesús Pérez-Martín; Juan Rodríguez-García; Germán Schwarz-Chavarri; Alfredo Tagarro-García; Diego van Esso-Arbolave; Diego Viasus; Tomàs Pumarola;