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Antigenic and genetic analysis of pandemic influenza A(H1N1) 2009 viruses from ...
Pechirra, Pedro; Arraiolos, Ana; Conde, Patrícia; Gonçalves, Paulo; Cordeiro, Rita; Guiomar, RaquelBackround: The influenza AH1N1 2009 pandemic virus (AH1N1pdm) was first detected in Portugal in May 4th 2009. This virus had origin in a reassortment between a North American swine lineage (already a triple reassortant, circulating in pigs since the late 1990’s) and a Eurasian swine lineage. As the HA (North American swine lineage) continues to circulate in the human population, its antigenic sites will continu...
Seasonal and pandemic patterns of Influenza in Portugal
Gonçalves, Paulo; Nunes, Baltazar; Paixão, Eleonora; Cordeiro, Rita; Pechirra, Pedro; Conde, Patrícia; Arraiolos, Ana; Furtado, CristinaThe National Influenza Reference Laboratory has been collecting data on influenza activity in Portugal since 1957 through the National Influenza Surveillance Programme, including information on clinical and virological characteristics of the disease, allowing the estimation of weekly incidence rates for influenza-like illness (ILI). This information has not only been used by the National Health Authorities for ...
Pandemic Influenza Virus Surveillance in Portugal: The Laboratory Network for t...
Guiomar, Raquel; Pechirra, Pedro; Gonçalves, Paulo; Cordeiro, Rita; Conde, Patrícia; Arraiolos, Ana; Batista, Inês; Paixão, Eleonora; Nunes, BaltazarIn April 2009 a new influenza A(H1N1) virus of swine origin disseminated throughout the world, resulting in the first pandemic of the XXI century. To face the increasing number of diagnosis being requested, a National Laboratory Network for Influenza Surveillance of the new influenza A(H1N1)pandemic virus was activated in Portugal. This is a descriptive study of the Influenza-like Ilness (ILI) cases reported by...
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