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Influenza, SARS-CoV-2, RSV and other respiratory viruses Documents

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Epidemiological Alert Seasonal Influenza in the Americas Region: End of the 2025 Season in the Southern Hemisphere Start of the 2025-26 Season in the Northern Hemisphere - 4 December 2025
Epidemiological alerts and updates
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 45 (14 November 2025)
Technical reports
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 44 (7 November 2025)
Technical reports
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 43 (1 November 2025)
Technical reports
Interpretation of real-time RT-PCR results
Technical and scientific products
Infographic - Influenza Virus Change
Infographics
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 42 (24 October 2025)
Technical reports
Cover
Operational guidance for sharing seasonal influenza viruses with WHO Collaborating Centres (CCs) under the Global Influenza Surveillance and Response System (GISRS)
Guidelines
Laboratory diagnostic algorithm for the detection of suspected cases of influenza A/H5
Technical and scientific products
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 41 (17 October 2025)
Technical reports
Influenza and SARS-CoV-2 integrated surveillance laboratory testing algorithm
Technical and scientific products
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 40 (10 October 2025)
Technical reports
An operational tool to estimate influenza disease burden averted through vaccination
An operational tool to estimate influenza disease burden averted through vaccination
Technical and scientific products
Interim Effectiveness Estimates of 2025 Southern Hemisphere Influenza Vaccines in Preventing Influenza-Associated Outpatient and Hospitalized Illness — Eight Southern Hemisphere Countries, March–September 2025
Interim Effectiveness Estimates of 2025 Southern Hemisphere Influenza Vaccines in Preventing Influenza-Associated Outpatient and Hospitalized Illness — Eight Southern Hemisphere Countries, March–September 2025
Technical and scientific products
Vaccines Seasonal Influenza Vaccination Programs in the Americas
Seasonal Influenza Vaccination Programs in the Americas: A Platform for Sustainable Life-Course Immunization and Its Role for Pandemic Preparedness and Response
Technical and scientific products
Recommendations for the use of immunization products against respiratory syncytial virus (RSV)
Technical and scientific products
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 39 (3 October 2025)
Technical reports
Report of the Webinar on the Analysis of the 2025 Season of Respiratory Virus Circulation in the Southern Hemisphere of the Region of the Americas
Meeting Documents
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 38 (26 September 2025)
Technical reports
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 37 (19 September 2025)
Technical reports
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Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 36 (12 September 2025)
Technical reports