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 – PAHO/WHO

Given the start of the season of increased circulation of influenza and other respiratory viruses in the northern hemisphere, the Pan American Health Organization/World Health Organization (PAHO/WHO) recommends that Member States adjust their…