[Safety of influenza vaccines in risk groups: analysis of adverse events following immunization reported in Valencian Community from 2005 to 2011].

Objective: To evaluate reports of adverse events following influenza immunization by sex, risk and age groups in Valencian Community from 2005 to 2011.

Methods: A pharmacoepidemiological descriptive cross-sectional observational study based on the reports of adverse events following immunization (AEFI) against influenza, registered through the Vaccination Information System (SIV) of Valencian Community from 1 January 2005 until 31 December 2011 was done.

Results: During the study period 5,107,790 doses of vaccine against influenza were reported, with an AEFI incidence of 1.