Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 8 (6 March 2026)

Regional situation: Influenza activity in the Americas remains stable, with a regional positivity rate of 15.9%. The influenza A(H3N2) subtype continues to predominate in most subregions, with the exception of the Andean subregion, where influenza A(H1N1)pdm09 predominates. RSV circulation continues to increase; however, it remains at low levels, with a regional positivity rate of 2%, driven mainly by increased activity in North America. SARS-CoV-2 positivity remains stable at 5.1%. At the regional level, the circulation of other respiratory viruses (ORV) has increased during the last four epidemiological weeks, reaching a regional positivity rate of 2.3%. Among these, rhinoviruses and coronaviruses continue to be the most frequently detected viruses. Hospitalizations for severe acute respiratory infection (SARI) and consultations for influenza-like illness (ILI) remain stable and are mainly associated with influenza circulation.