Influenza updates

Peer-reviewed literature

Fri, 25 May 2012 11:00:00 GMT

Peer-reviewed literature

Fri, 25 May 2012 11:00:00 GMT

Influenza virus activity in the world

Fri, 25 May 2012 09:00:00 GMT

Based on FluNet reporting (as of 22 May 2012, 13:00 UTC), during weeks 18 to 19 (29 April 2012 to 12 May 2012), National Influenza Centres (NICs) and other national influenza laboratories from 83 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 26 758 specimens. 3 540 were positive for influenza viruses, of which 2 366 (66.8%) were typed as influenza A and 1 174 (33.2%) as influenza B. Of the sub-typed influenza A viruses, 190 (10.1%) were influenza A(H1N1)pdm09 and 1 691 (89.9%) were influenza A(H3N2). Of the characterized B viruses, 45 (67.2%) belong to the B-Yamagata lineage and 22 (32.8%) to the B-Victoria lineage.

Influenza virus activity in the world

Fri, 25 May 2012 09:00:00 GMT

Influenza virus activity in the world

Fri, 11 May 2012 13:00:00 GMT

Based on FluNet (as of 7 May 2012, 10:00 UTC), during weeks 16 to 17 (15 April 2012 to 28 April 2012), National Influenza Centres (NICs) and other national influenza laboratories from 83 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 30 585 specimens. 5 297 were positive for influenza viruses, of which 3 343 (63.1%) were typed as influenza A and 1 954 (36.9%) as influenza B. Of the subtyped influenza A viruses, 308 (13.4%) were influenza A(H1N1)pdm09 and 1 982 (86.6%) were influenza A(H3N2). Of the characterized B viruses, 85 (37.6%) belonged to the B-Yamagata lineage and 141 (62.4%) to the B-Victoria lineage.

Peer-reviewed literature

Thu, 10 May 2012 12:00:00 GMT

Influenza virus activity in the world

Fri, 27 Apr 2012 10:00:00 GMT

Based on FluNet reporting (as of 24 April 2012, 12:40 UTC), during weeks 14 to 15 (01 April 2012 to 14 April 2012), National Influenza Centres (NICs) and other national influenza laboratories from 78 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 28664 specimens. 6096 were positive for influenza viruses, of which 4477 (73.4%) were typed as influenza A and 1619 (26.6%) as influenza B. Of the sub-typed influenza A viruses, 569 (18.6%) were influenza A(H1N1)pdm09 and 2481 (81.3%) were influenza A(H3N2). Of the characterized B viruses, 197 (69.4%) belong to the B-Yamagata lineage and 87 (30.6%) to the B-Victoria lineage.

Influenza virus activity in the world

Fri, 13 Apr 2012 15:00:00 GMT

Based on FluNet reporting (as of 12 April 2012, 6.15 UTC) during weeks 12 to 13 (18/03/2012 to 31/03/2012), National Influenza Centres (NICs) and other national influenza laboratories from 80 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 36 319 specimens. 9 814 were positive for influenza viruses, of which 7 575 (77.2%) were typed as influenza A and 2 239 (22.8%) as influenza B. Of the sub-typed influenza A viruses, 754 (16.2%) were influenza A(H1N1)pdm09 and 3 907 (83.8%) were influenza A(H3N2). Of the characterized B viruses, 364 (57.1%) belong to the B-Yamagata lineage and 273 (42.9%) to the B-Victoria lineage.

Peer-reviewed literature

Fri, 30 Mar 2012 12:00:00 GMT

Influenza virus activity in the world

Fri, 30 Mar 2012 10:30:00 GMT

Based on FluNet reporting (as of 27 March 2012, 14:00 UTC) during weeks 10 to 11 (4 March 2012 to 17 March 2012), National Influenza Centres (NICs) and other national influenza laboratories from 88 countries, areas or territories reported data. The WHO GISRS laboratories tested more than 50,919 specimens. 15,214 were positive for influenza viruses, of which 11,559 (76%) were typed as influenza A and 3,655 (24%) as influenza B. Of the sub-typed influenza A viruses, 957 (15%) were influenza A(H1N1)pdm09 and 5,351 (85%) were influenza A(H3N2). Of the characterized B viruses, 420 (45%) belong to the B-Yamagata lineage and 509 (55%) to the B-Victoria lineage.