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  • Influenza Situation Report: Regional Updates
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  • Influenza Situation Report: Regional Updates
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Regional Update, Influenza. Epidemiological Weeks 50-51 (29 December 2022)

Actualización regional, Influenza. Semanas Epidemiológicas 50-51 (29 de diciembre del 2022)

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Date
2023-01-06
Author
Pan American Health Organization
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Abstract
[WEEKLY SUMMARY]. North America: Influenza activity was moderate, although increasing in the subregion, with the predominance of influenza A(H3N2) and co-circulation of A(H1N1)pdm09 and B/Victoria. The SARS-CoV-2 activity has increased, while RSV activity continued to decline. In Canada, influenza activity has decreased; most surveillance indicators were above expected levels. In Mexico, influenza activity continued above expected levels, with SARI cases at low-intensity levels. Influenza activity seems to have reached a plateau at moderate-intensity levels in the United States, with influenza-associated cumulative hospitalization rates higher than the highest cumulative in-season hospitalization rate observed in week 51 (2010-21). Elevated RSV activity continued but with a decreasing trend. Caribbean: Influenza activity was moderate across the subregion with A(H3N2) virus predominance and B/Victoria co-circulation. SARS-CoV-2 activity remained low overall. Belize and Haiti have shown increased influenza activity at low-intensity levels, while Guadeloupe and Martinique registered increased RSV activity. Central America: Influenza activity was at moderate levels, with the predominance of influenza A(H3N2) and the co-circulation of influenza B/Vitoria (where lineage was determined). Increased influenza activity was reported in Guatemala. SARS-CoV-2 percent positivity increased in the subregion overall, while RSV decreased. Andean: Influenza activity was low, with the predominance of influenza A(H3N2) and co-circulation of influenza A(H1N1)pdm09 and B/Victoria. Bolivia and Ecuador reported increased influenza B/Victoria and A(H3N2) detections, with increased SARI activity at moderate-intensity levels in both countries. In addition, SARS-CoV-2 percent positivity continued elevated in Colombia, Ecuador, and Peru. In the subregion, RSV activity was low overall. Brazil and Southern Cone: Influenza activity was moderate, with influenza A(H3N2) predominance and co-circulation of influenza A(H1N1)pdm09 and influenza B/Victoria. Argentina reported decreasing influenza activity with influenza B (lineage undetermined) predominance. In Chile, influenza A(H3N2) predominated, showing a decreasing trend. The SARS-CoV-2 activity was elevated across the subregion but with a decreasing trend. Increased RSV activity continued to be reported in Brazil and Chile.
 
[RESUMEN SEMANAL]. América del Norte: en la subregión la actividad de la influenza estuvo moderada, aunque con tendencia al aumento, con predominio de influenza A(H3N2) y la circulación concurrente de A(H1N1)pdm09 y B/Victoria. La actividad del SARS-CoV-2 ha aumentado, mientras que la actividad del VRS continuó disminuyendo. En Canadá, la actividad de la influenza ha disminuido; la mayoría de los indicadores de vigilancia estuvieron por encima de los niveles esperados. En México, la actividad de la influenza continuó por encima de los niveles esperados; los casos de IRAG estuvieron en niveles de baja intensidad. En los Estados Unidos la actividad de la influenza parece haber llegado a una meseta, ubicándose en niveles de intensidad moderada, con tasas de hospitalización acumuladas asociadas a la influenza más altas que la tasa de hospitalización acumulada durante la temporada más alta observada en la semana 51 (2010-21). El VRS continúa con una actividad elevada pero con una tendencia decreciente. Caribe: la actividad de la influenza estuvo moderada en toda la subregión con predominio del virus A(H3N2) y circulación concurrente de influenza B/Victoria. La actividad del SARS-CoV-2 se mantuvo baja en general. Belice y Haití han mostrado una mayor actividad de influenza a niveles de baja intensidad, mientras que Guadalupe y Martinica registraron una mayor actividad de VRS. América Central: la actividad de la influenza estuvo en niveles moderados, con predominio de influenza A(H3N2) y la circulación concurrente de influenza B/Vitoria (en muestras con linaje determinado). Se informó un aumento de la actividad de la influenza en Guatemala. El porcentaje de positividad del SARS-CoV-2 aumentó en la subregión en general, mientras que el VRS disminuyó. Países Andinos: la actividad de la influenza estuvo baja, con predominio de influenza A(H3N2) y circulación concurrente de influenza A(H1N1)pdm09 y B/Victoria. Bolivia y Ecuador reportaron un aumento en las detecciones de influenza B/Victoria y A(H3N2), con una actividad elevada de IRAG, en niveles moderados en ambos países. Además, el porcentaje de positividad del SARS-CoV-2 continúa elevado en Colombia, Ecuador y Perú. En la subregión, la actividad del VRS estuvo baja en general. Brasil y Cono Sur: la actividad de la influenza estuvo moderada, con predominio de influenza A(H3N2) y circulación concurrente de influenza A(H1N1)pdm09 e influenza B/Victoria. Argentina notificó una disminución de la actividad de influenza con predominio de influenza B (linaje indeterminado). En Chile predominó influenza A(H3N2), mostrando una tendencia decreciente. La actividad del SARS-CoV-2 estuvo elevada en toda la subregión pero con una tendencia a la baja. Continuó la notificación de un aumento de la actividad del VRS en Brasil y Chile.
 
Subject
Influenza, Human; COVID-19; SARS-CoV-2; Betacoronavirus; International Health Regulations; Americas; Caribbean Region; Gripe Humana; Reglamento Sanitario Internacional; Américas; Región del Caribe
URI
https://iris.paho.org/handle/10665.2/56989
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  • Influenza Situation Report: Regional Updates

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