World: Weekly Report Epidemiological week: 2026-16 / Reporte semanal de Virus Respiratorios Semana epidemiológica: 2026-16 [EN/ES]

Country: World Source: Pan American Health Organization Please refer to the attached file. Regional Situation: In EW16, influenza activity in the Americas reflects the characteristic seasonal divergence of the transition period: North America and the Caribbean are consolidating the end of the season, with positivity rates declining toward the interseasonal baseline; Central America is completing its post-peak decline; while Brazil and the Southern Cone are entering their austral winter season with a sustained upward trend. The Andean Region presents an intermediate pattern, with an overall decline but divergent trajectories between countries. A(H3N2) is the predominant subtype in most Southern Hemisphere subregions. RSV shows opposite patterns by hemisphere: declining in North America and increasing in the Andean Region and in Brazil and the Southern Cone, consistent with the start of the austral season. SARS-CoV-2 continues its widespread decline across all subregions, remaining at low levels without signs of resurgence. SARI and ILI indicators show declines in the Northern Hemisphere, with the highest relative burden concentrated in the Southern Hemisphere during this reporting period. Situación regional: En la SE16, la actividad de influenza en las Américas refleja la divergencia estacional característica del período de transición: América del Norte y el Caribe consolidan el fin de temporada con positividades en descenso hacia la línea de base interestacional, Centroamérica completa su descenso post-pico, mientras Brasil y Cono Sur inician su temporada invernal austral con tendencia ascendente sostenida. La Región Andina presenta un patrón intermedio con descenso agregado pero trayectorias divergentes entre países. A(H3N2) es el subtipo predominante en la mayoría de las subregiones d...

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