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Weekly reporting on influenza surveillance in Europe for the 2012?13 season started in week 40/2012 but active influenza transmission began around week 49/2012, approximately six weeks earlier than in the 2011/2012 season.
? In week 7/2013, 19 of the 29 countries reporting indicated concomitantly high/medium-intensity transmission and wide geographic spread. Ten countries reported decreasing trends, the first time since the beginning of influenza transmission for five of them.
? In week 7/2013, the proportion of influenza-positive cases among sentinel specimens remained high (52%) but continued to decrease, as first observed in the previous week.
? Since week 40/2012, an even distribution of influenza virus types has been observed, 50% each for type A and type B viruses. Among influenza A viruses, an increasing proportion of A(H1)pdm09 over A(H3) has been reported since week 52/2012.
? For week 7/2013, 78 hospitalised laboratory-confirmed influenza cases were reported by five countries (Belgium, France, Romania, Slovakia, and Spain), 48 (62%) tested positive for influenza type A and 30 (38%) for type B.
? On 8 February 2013, ECDC published its annual risk assessment for seasonal influenza 2012-13 based on data up to week 3/2013.
Influenza activity remained substantial in week 7/2013 across Europe but an increasing number of countries reported indications of declining transmission.
? In week 7/2013, 19 of the 29 countries reporting indicated concomitantly high/medium-intensity transmission and wide geographic spread. Ten countries reported decreasing trends, the first time since the beginning of influenza transmission for five of them.
? In week 7/2013, the proportion of influenza-positive cases among sentinel specimens remained high (52%) but continued to decrease, as first observed in the previous week.
? Since week 40/2012, an even distribution of influenza virus types has been observed, 50% each for type A and type B viruses. Among influenza A viruses, an increasing proportion of A(H1)pdm09 over A(H3) has been reported since week 52/2012.
? For week 7/2013, 78 hospitalised laboratory-confirmed influenza cases were reported by five countries (Belgium, France, Romania, Slovakia, and Spain), 48 (62%) tested positive for influenza type A and 30 (38%) for type B.
? On 8 February 2013, ECDC published its annual risk assessment for seasonal influenza 2012-13 based on data up to week 3/2013.
Influenza activity remained substantial in week 7/2013 across Europe but an increasing number of countries reported indications of declining transmission.
