Sivira respiratory infection surveillance system

SiVIRA is a system for the surveillance of influenza, SARS-CoV-2 and respiratory syncytial viruses (RSV) and the evaluation of established control and prevention measures' effectiveness. It was developed in 2020, and has been supported by the accumulated experience of the Spanish Influenza Surveillance System. Surveillance, active throughout the year, is carried out in the area of Primary Care and Hospital Care. There are multiple sources of information in Spain, the main ones being sentinel surveillance of mild acute respiratory infection, in Primary Care, and severe, in hospitals, both systematically and with a syndromic component. Other sources are investigation of influenza outbreaks, non -sentinel virological surveillance of influenza and RSV, excess mortality or international surveillance. The sentinel population in each autonomous community are patients attended by Primary Care doctors or sentinel centers. In the case of sentinel hospitals, each one estimates the population of its reference area. Annual reports for the 2020-2021 and 2021-2022 seasons and weekly reports corresponding to the 20222023 and 2023-2024 seasons have been published. They describe the successive COVID-19 pandemic waves, as well as the behavior of the flu and RSV epidemics since their beginning.