Oseltamivir resistance in human seasonal influenza viruses (A/H1N1) in EU and EFTA countries: an update

Following the publications in Eurosurveillance on 31 January [1,2], the European Centre for Disease Prevention and Control (ECDC), the European Influenza Surveillance Scheme (EISS), the World Health Organization (WHO) and their partners have agreed to update the data on the occurrence of resistance of influenza A/H1N1 viruses to oseltamivir appearing on the ECDC and EISS websites on a weekly basis (every Thursday afternoon). Data on the ECDC website are for European Union (EU) and European Free Trade Association (EFTA) countries. The WHO has also published a global table, which it will also refresh weekly. All these data are available through an HTML page on the ECDC web-site [3]. The European data made available through EISS and the EU DG Research-funded European Surveillance Network for Vigilance Against Viral Resistance (VIRGIL) are based on the data that have been uploaded to the EISS antiviral resistance data-base by a fixed time on a Wednesday for publication on a Thursday.