sharon sanders
Editor-in-Chief & President
hat tip @lisaschnirring
February 2012
Influenza activity, September 2011 – January 2012
Between September 2011 and January 2012, influenza activity was reported in Africa, the Americas, Asia, Europe and Oceania. Influenza A(H1N1)pdm09 viruses circulated at very low levels in general with the exception of some countries in Asia and the Americas. Influenza A(H3N2) viruses were predominant in Europe, many countries in the Americas and northern Africa and some countries in Asia. Influenza B viruses circulated in many parts of the world and predominated in some countries. In the northern hemisphere, influenza activity in general was low from September to December 2011, increasing in January 2012 in most countries.
Regional A(H1N1)pdm09 activity was reported by a few countries in Asia and Central America. Widespread activity was reported in Mexico in December 2011 and January 2012. Localized and sporadic activity was reported in northern Africa, Europe and North America.
Influenza A(H3N2) viruses caused regional outbreaks in Asia throughout the period with widespread activity reported in Japan in January 2012. Activity was low in Europe but increased in January 2012 with regional and widespread outbreaks reported in Spain and a number of other countries. Influenza A(H3N2) activitycontinues to increase in Europe. In northern Africa, activity increasedfrom December 2011 with regional and widespread outbreaks reported. In North America, the United States of America reported regional outbreaks from November 2011 onwards while sporadic and localized activity was reported in Canada and Mexico.
Influenza B virus activity increased in North America from December 2011 with regional outbreaks reported by the United States of America in January 2012. In China, influenza B viruses predominated throughout the period. Sporadic and
localized influenza B activity was reported by a number of countries in northern Africa, Asia and Europe.
In the southern hemisphere, influenza activity in general was low with the exception of Australia and New Zealand where regional outbreaks due to co-circulation of influenza A(H1N1)pdm09, A(H3N2) and B viruses were reported in September and October 2011. Some South American countries also reported regional and widespread activity early in the period.
A(H1N1)pdm09 was reported at low levels with the exception of regional activity in a few countries in South America and Oceania. Influenza A(H3N2) was the predominant virus in many countries in South America with widespread outbreaks occurring in Paraguay and regional outbreaks in Argentina and Peru in September and October 2011. Sporadic and localized activity of A(H3N2) and B viruses was reported in southern Africa. In tropical areas, many countries experienced outbreaks of varying intensity of influenza A(H1N1)pdm09, A(H3N2) and B viruses. Cambodia reported regional activity throughout most of this period.
The extent and type of seasonal influenza activity worldwide are summarized in Annex 1.
Zoonotic influenza infections caused by A(H5N1), A(H3N2) variant (v)
A(H1N1)v and A(H1N2)v viruses From 20 September 2011 to 21 February 2012, 21 confirmed human cases of A(H5N1), 15 of which were fatal, were reported from Cambodia, China, Egypt, Indonesia, and Viet Nam where highly pathogenic avian influenza A(H5N1) is present in poultry and wild birds. Since December 2003, a total of 585 cases with 346 deaths have been confirmed in 15 countries.
To date there has been no evidence of sustained human-to-human transmission. Sporadic human cases of influenza A variant (v) viruses have been detected since September 2011 in the United States of America where a total of 8 infections caused by A(H3N2)v viruses have been reported along with single cases of A(H1N1)v and A(H1N2)v.
No human cases of influenza A(H9N2) were detected during the period 20 September 2011 to 21February 2012.
more in attachment....
February 2012
Influenza activity, September 2011 – January 2012
Between September 2011 and January 2012, influenza activity was reported in Africa, the Americas, Asia, Europe and Oceania. Influenza A(H1N1)pdm09 viruses circulated at very low levels in general with the exception of some countries in Asia and the Americas. Influenza A(H3N2) viruses were predominant in Europe, many countries in the Americas and northern Africa and some countries in Asia. Influenza B viruses circulated in many parts of the world and predominated in some countries. In the northern hemisphere, influenza activity in general was low from September to December 2011, increasing in January 2012 in most countries.
Regional A(H1N1)pdm09 activity was reported by a few countries in Asia and Central America. Widespread activity was reported in Mexico in December 2011 and January 2012. Localized and sporadic activity was reported in northern Africa, Europe and North America.
Influenza A(H3N2) viruses caused regional outbreaks in Asia throughout the period with widespread activity reported in Japan in January 2012. Activity was low in Europe but increased in January 2012 with regional and widespread outbreaks reported in Spain and a number of other countries. Influenza A(H3N2) activitycontinues to increase in Europe. In northern Africa, activity increasedfrom December 2011 with regional and widespread outbreaks reported. In North America, the United States of America reported regional outbreaks from November 2011 onwards while sporadic and localized activity was reported in Canada and Mexico.
Influenza B virus activity increased in North America from December 2011 with regional outbreaks reported by the United States of America in January 2012. In China, influenza B viruses predominated throughout the period. Sporadic and
localized influenza B activity was reported by a number of countries in northern Africa, Asia and Europe.
In the southern hemisphere, influenza activity in general was low with the exception of Australia and New Zealand where regional outbreaks due to co-circulation of influenza A(H1N1)pdm09, A(H3N2) and B viruses were reported in September and October 2011. Some South American countries also reported regional and widespread activity early in the period.
A(H1N1)pdm09 was reported at low levels with the exception of regional activity in a few countries in South America and Oceania. Influenza A(H3N2) was the predominant virus in many countries in South America with widespread outbreaks occurring in Paraguay and regional outbreaks in Argentina and Peru in September and October 2011. Sporadic and localized activity of A(H3N2) and B viruses was reported in southern Africa. In tropical areas, many countries experienced outbreaks of varying intensity of influenza A(H1N1)pdm09, A(H3N2) and B viruses. Cambodia reported regional activity throughout most of this period.
The extent and type of seasonal influenza activity worldwide are summarized in Annex 1.
Zoonotic influenza infections caused by A(H5N1), A(H3N2) variant (v)
A(H1N1)v and A(H1N2)v viruses From 20 September 2011 to 21 February 2012, 21 confirmed human cases of A(H5N1), 15 of which were fatal, were reported from Cambodia, China, Egypt, Indonesia, and Viet Nam where highly pathogenic avian influenza A(H5N1) is present in poultry and wild birds. Since December 2003, a total of 585 cases with 346 deaths have been confirmed in 15 countries.
To date there has been no evidence of sustained human-to-human transmission. Sporadic human cases of influenza A variant (v) viruses have been detected since September 2011 in the United States of America where a total of 8 infections caused by A(H3N2)v viruses have been reported along with single cases of A(H1N1)v and A(H1N2)v.
No human cases of influenza A(H9N2) were detected during the period 20 September 2011 to 21February 2012.
more in attachment....