Alberto Mangas-Moro, Respiratory Medicine Service, Hospital Universitario La Paz, Madrid, Spain
Ester Zamarrón-de-Lucas, Respiratory Medicine Service, Hospital Universitario La Paz, Madrid, Spain
Carlos J. Carpio-Segura, Respiratory Medicine Service, Hospital Universitario La Paz, Madrid, Spain
Rodolfo Álvarez-Sala-Walther, Respiratory Medicine Service, Hospital Universitario La Paz, Madrid, Spain
José R. Arribas-López, Infectious Diseases Unit, Internal Medicine Service; Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Concepción Prados-Sánchez, Respiratory Medicine Service, Hospital Universitario La Paz, Madrid, Spain; Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Juan J. Ríos-Blanco, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Juan C. Figueira, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Beatriz Díaz-Pollán, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Dolores Madero, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Javier Cobas, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Gloria Forés, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Fernando Baquero, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
María J. Pinto, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Margarita Pastor, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Herminia Ramos, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Santos García, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Gabriela Martins, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Ana Robustillo, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Isabel San-Juan, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain
Rodolfo Álvarez-Sala, Seasonal Flu Working Group. Hospital Universitario La Paz, Madrid, Spain


Objectives: The objectives of this study are (1) to analyse which group of admitted patients with risk factors is most vaccinated, (2) to find out whether vaccinated patients admitted for flu have fewer complications, and (3) to check whether there are differences in demographic and therapeutic characteristics between vaccinated and unvaccinated patients who have been admitted. Patients and methods: This is a single-centre, observational, cross-sectional, and retrospective study of patients admitted for flu at La Paz University Hospital in the 2013–2014 and 2014–2015 seasons, with an analysis of the variables included in the clinical history and mandatory declaration documents. Results: A total of 179 patients were admitted for influenza infection in the two seasons studied, of whom 65 (36.3%) patients were vaccinated. Patients with chronic heart disease were significantly more vaccinated than other risk groups. Furthermore, the average age of vaccinated patients was significantly higher than that of unvaccinated patients. We did not find any other significant differences in the remaining variables when comparing the two groups, nor did we find any less development of complications in the admitted and vaccinated patients. Conclusion: It is important to emphasise vaccination campaigns, increase vaccination coverage, and raise awareness of vaccination among all patients with chronic diseases.



Keywords: Vaccination. Influenza. Hospital. Complications. Flu. Virus.