Epidemiological Alert, Update on Influenza in Brazil; WHO Recommendations for the Flu Vaccine; Lancet Article on Influenza; Training in West Nile Virus (WNV) Surveillance and Diagnostics in Argentina (26 November 2003)

Abstract

Brazil, 2003: Of all people receiving medical attention at sentinel centers up to Epidemiological Week (EW) 44 (to 1 November 2003), 18% of them showed signs of flu syndrome (n = 902,930). During this same period, 1,143 samples of naso-pharangeal secretions were analyzed, of which 115 were positive: 108 (93%) for Influenza A and 7 (6.1%) for Influenza B. During EWs 29 and 30, influenza was identified in 83.3% of all samples, with Influenza A predominating.

Brasil, 2003: Hasta la semana epidemiológica 44, que terminó el 1 de noviembre, el 18% de las personas que fueron atendidas en las unidades centinelas correspondían a síndrome gripal (n = 902.930). En ese mismo período fueron analizadas 1.143 muestras de secreciones nasofaríngeas, de las cuales 115 resultaron positivas para el virus de la influenza (10%), siendo 108 (93%) virus de influenza A y 7 (6,1%) virus de influenza B. Durante las semanas epidemiológicas 29 y 30 se identificó influenza en el 83,3% de las muestras, con predominio del virus de influenza A.