Regional Update, Influenza and Other Respiratory Viruses. Epidemiological Week 18 (12 May 2023)
Actualización regional, Influenza y otros virus respiratorios. Semana Epidemiológica 18 (12 de mayo del 2023)
Date
2023-05-19Metadata
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[WEEKLY SUMMARY].
North America: Influenza activity has remained at low levels. During the last 4 EW, the predominant influenza viruses have been
B/Victoria, with also circulation of influenza A (mostly A(H1N1)pdm09) at a lesser extent. Respiratory Syncytial Virus (RSV) activity has
remained at low level. SARS-CoV-2 activity has decreased however it continues circulating at high levels.
Caribbean:Influenza activity has shown a rise in recent weeks with medium levels of activity. During the last 4 EW, the predominant
influenza viruses have been B/Victoria, with less circulation of influenza A (mostly A(H1N1)pdm09). RSV activity has remained low. SARSCoV-
2 activity has shown a decrease and is currently at low levels of circulation.
Central America: Influenza activity has shown medium levels of circulation, with a sharp decrease in recent weeks. During the last 4 EW,
the predominant influenza viruses have been A, mostly A(H1N1)pdm09, with less circulation of influenza B /Victoria. RSV activity has
remained low. SARS-CoV-2 activity has remained low and has decreased in recent weeks.
Andean: Influenza activity has shown an increase in the number of detections while remaining stable at low levels of positivity. During the
last 4 EW, the predominant influenza viruses have been A, mostly A(H1N1)pdm09, with less circulation of influenza B (Victoria). RSV activity
remained at medium levels of circulation. SARS-CoV-2 activity has shown an increase and is currently circulating at medium levels.
Brazil and Southern Cone: Influenza activity has shown a pronounced increase with high levels of circulation. During the last 4 EW, the
predominant influenza viruses have been A, mostly A(H1N1)pdm09, with co-circulation of influenza B/Victoria. RSV activity, after showing
an increase in recent weeks a decreasing trend has been observed. SARS-CoV-2 activity has remained at low levels. [RESUMEN SEMANAL].
Norteamerica: La actividad de influenza ha presentado un ligero incremento aunque manteniéndose en niveles bajos. Durante las 4
últimas SE los virus influenza predominantes han sido B/Victoria, con circulación en menor medida de influenza A (mayoritariamente
A(H1N1)pdm09). La actividad del VSR ha presentado un ascenso pronunciado con niveles medios de circulación. La actividad del SARSCoV-
2 se ha mantenido elevada.
Caribe: La actividad de la influenza ha mostrado un aumento en las últimas SE con niveles medios de actividad. Durante las últimas 4
semanas epidemiológicas, los virus predominantes de la influenza han sido B/Victoria, con menos circulación de la influenza A
(principalmente A(H1N1)pdm09). La actividad del VSR ha permanecido baja. La actividad del SARS-CoV-2 ha mostrado una disminución y
actualmente se encuentra en niveles bajos de circulación.
Central America: La actividad de influenza ha mostrado niveles moderados de circulación, con una disminución pronunciada en las
últimas semanas. Durante las últimas 4 semanas epidemiológicas, los virus predominantes de influenza han sido del tipo A, principalmente
A(H1N1)pdm09, con menor circulación del tipo B/Victoria. La actividad de VSR ha permanecido baja. La actividad de SARS-CoV-2 ha
permanecido baja y ha disminuido en las últimas semanas.
Andina: La actividad de la influenza ha presentado un incremento en el número de detecciones manteniéndose la positividad estables a
niveles bajos. Durante las 4 últimas SE los virus influenza predominantes han sido A, mayoritariamente A(H1N1)pdm09, con circulación en
menor medida de influenza B /Victoria. La actividad del VSR ha presentado un incremento situándose en niveles medios de circulación. La
actividad del SARS-CoV-2 ha presentado un incremento encontrándose en niveles medios de circulación.
Brasil y Cono Sur: La actividad de la influenza ha presentado un incremento pronunciado situándose en niveles altos de circulación.
Durante las 4 últimas SE los virus influenza predominantes han sido A, mayoritariamente A(H1N1)pdm09,con circulación en menor medida
de influenza B (Victoria). La actividad del VSR tras mostrar un ascenso pronunciado en las semanas previas ha mostrado un descenso. La
actividad del SARS-CoV-2 se ha mantenido baja.
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