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Pandemic (H1N1) 2009 - update 87
Weekly update
12.02.2010 - WHO

As of 7 February 2010, worldwide more than 212 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 15292 deaths. WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

In the temperate zone of the northern hemisphere, overall pandemic influenza activity continued to decline in most countries. The most active areas of transmission continue to be in later peaking areas, particularly northern Africa, South Asia, and East Asia. Of note, Senegal became the third country within the past month (and fifth overall) to confirm first cases of pandemic H1N1 2009 in West Africa. There is insufficient evidence at this point to determine if this heralds the beginning of a period of more widespread transmission in West Africa, which heretofore may have been largely spared a significant period of communitywide pandemic influenza virus transmission.

In North Africa, pandemic influenza transmission persists but substantial declines in activity have been observed over the past month across the region. In Morocco, levels of ILI have returned to near baseline, and in Egypt, the number of confirmed cases has declined considerably ... mehr

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Pandemic (H1N1) 2009 - update 88
Weekly update
19.02.2010

As of 14 February 2010, worldwide more than 212 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 15921 deaths. WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The situation is largely unchanged since the previous update. In the temperate zone of the northern hemisphere, active but declining pandemic influenza transmission persists in limited areas of eastern and southern Europe, South Asia, and in East Asia. Several countries in West Africa reported increases in the number of cases but there is as yet insufficient evidence to conclude that widespread community transmission is occurring. An increasing trend in respiratory diseases activity was reported in Thailand and Jamaica, however the cause of the respiratory disease is uncertain at this point [...]

[...] In North Africa, pandemic influenza transmission persists but substantial declines in activity continue to be reported over the past month. In Sub-Saharan Africa, limited data suggest that pandemic influenza virus transmission may be sporadic in most areas of the continent. Several countries in West Africa continue to report increases in the numbers of confirmed cases of pandemic influenza, however, currently, no countries in the region are reporting an increasing trend in respiratory diseases activity ... mehr

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Pandemic (H1N1) 2009 - update 89
Weekly update
26.02.2010 - WHO

As of 21 February 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 16226 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

In the temperate zone of the northern hemisphere, pandemic influenza virus continues to be detected across many countries, however, overall influenza activity continues to wane in most places. The most active areas of transmission are currently in parts of south and southeast Asia and in limited areas of east and southeastern Europe. [...]

[...] In North Africa and West Asia, pandemic influenza virus continues to circulate at low levels as rates of illness in most countries in the region continued to decline or return to baseline. In Afghanistan, an increasing trend of respiratory diseases with moderate healthcare impact was report, however, it is unknown if the recent increase is associated with circulation of influenza virus.

In Sub-Saharan Africa, limited data suggest that pandemic influenza virus transmission continued to be sporadic in most areas of the continent. Several countries in West Africa continue to report slight increases in the numbers of confirmed cases of pandemic influenza indicating that community transmission is likely beginning in the area; however, data are very limited ... mehr

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Pandemic (H1N1) 2009 - update 90
Weekly update
05.03.2010 - WHO

As of 28 February 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 16455 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

Summary: In the temperate zone of the northern hemisphere, transmission of virus persists in some areas of Europe and Asia but influenza activity is declining and at low level in the most areas. The most active areas of transmission are currently observed in parts of Southeast Asia and East and South-eastern Europe. Recently, influenza type B is increasingly reported in Asia. [...]

[...] In North Africa and West Asia, influenza activity is low. However, respiratory tract infections in the north western area of Pakistan and Afghanistan are reportedly increasing. Whether this increased activity is due to circulation of influenza is not known.

In Sub-Saharan Africa, several West African countries are increasingly reporting pandemic influenza cases, though surveillance data from the area is quite limited. Data from the rest of Africa suggests that influenza activity in most countries is low and transmission continues to be sporadic. Some detections of seasonal influenza H1N1, H3N2, and influenza type B are still being reported ... mehr

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Pandemic (H1N1) 2009 - update 91
Weekly update
12.03.2010 - WHO

As of 7 March 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 16713 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza transmission are currently in Southeast Asia, however, lower levels of pandemic virus circulation persist in other parts of Asia and in Eastern and South-eastern Europe. In West Africa, limited data suggests that pandemic influenza virus transmission may be increasing in region. Of note, seasonal influenza B viruses have been increasingly detected in Asia and appear to be spreading westward.

In Sub-Saharan Africa, limited data suggests that on-going community transmission of pandemic influenza virus continues to increase in parts of West Africa, without clear evidence of a peak in activity. Increased detections of pandemic influenza virus have been observed among sentinel surveillance sites in several countries, including Senegal and Cote D'Ivoire, however, to date, data is limited regarding the spectrum of clinical severity of cases. Recent increases in influenza activity have also been reported in Rwanda. Much of eastern and southern Africa likely experienced an earlier peak in pandemic influenza activity during November 2009 and late summer 2009, respectively. [...]

[...] In North Africa and Western Asia, overall pandemic influenza activity remains low in most places, with the exception of Iraq and Afghanistan, both of which reported regional spread of influenza with an increasing trend in respiratory diseases activity. In Afghanistan, a moderate impact on the healthcare system was reported in association with increased respiratory diseases activity. Although overall influenza activity remains low in Iran, all recent influenza virus detection have been due to seasonal influenza B viruses ... mehr

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Pandemic (H1N1) 2009 - update 92
Weekly update
19.03.2010 - WHO

As of 14 March 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including at least 16813 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza transmission continue to be in Southeast Asia and West Africa. Limited data suggests that pandemic influenza activity may be increasing across parts of Central America and the Caribbean. Low levels of pandemic influenza virus continue to circulate across southern and south-eastern Europe and in East, West, and South Asia. Although pandemic influenza virus continues to be the predominant influenza virus circulating worldwide, seasonal influenza B viruses are predominate in East Asia, and have been detected at low levels across southeast Asia and eastern Africa [...]

[...] In West Africa, limited data suggest that active transmission of pandemic influenza virus remains sustained across much of the region without clear evidence of a peak in activity. In Ghana, 38% of respiratory specimens collected during the past week tested positive for influenza, and of these, approximately 70% were pandemic H1N1. Limited sentinel surveillance data from Nigeria suggest that levels of ILI have increased over the past two months in conjunction with increased detections of pandemic influenza H1N1 virus. Localized outbreaks of pandemic H1N1 influenza have also been recently reported in parts of East Africa, particularly in Rwanda. Pandemic influenza virus continues to be the predominant influenza virus circulating in West and East Africa, however, small numbers of seasonal H3N2 and seasonal B viruses have also been identified [...]

[...] In North Africa and Western Asia, limited data suggests that pandemic influenza virus continues to circulate at low levels across the region. An increasing trend of respiratory diseases activity in association with regional spread of influenza was reported for past three weeks in Afghanistan and the past two weeks in Iraq; however, overall intensity of activity remains low to moderate in both countries. Localized to regional spread of pandemic was also reported in Morocco, Libyan Arab Jamahiriya, Egypt, Jordan, Yemen, and Oman ... mehr

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Pandemic (H1N1) 2009 - update 93
Weekly update
26.03.2010 - WHO

As of 21 March 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 16,931 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza virus transmission currently are in parts of Southeast Asia, West Africa, and in the tropical zone of the Americas. After a period of sustained pandemic influenza transmission in Thailand over the past two months, overall activity now appears to be decreasing. In West Africa, limited data suggests that active transmission of pandemic influenza virus persists without clear evidence of a peak in activity. In Central America and in the tropical zone of South America, an increasing trend of respiratory disease activity associated with circulation of pandemic influenza virus has been reported since early March 2010 in an increasing number of countries. Although pandemic influenza virus continues to be the predominant influenza virus circulating worldwide, seasonal influenza B viruses are predominate in East Asia, and have been increasingly detected at low levels across southeast and western Asia, eastern Africa, and in parts of Europe. [...]

[...] In Sub-Saharan Africa, pandemic influenza activity remains variable. Limited data suggest that the most active areas of pandemic influenza virus transmission continue to be in West Africa and in limited areas of East Africa, particularly in Rwanda. Twenty-seven percent of respiratory specimens in Ghana, and 47% of specimens in Rwanda, tested positive for pandemic influenza virus during mid March 2010. In Senegal, a high intensity of respiratory diseases activity was reported in association with increased detections of pandemic influenza virus. Pandemic influenza virus continues to be the predominant influenza virus circulating in West and East Africa, however, small numbers of seasonal influenza H3N2 and seasonal influenza B viruses have also been identified. [...]

[...] In Europe, overall pandemic influenza virus transmission continued to decline or remain low in most countries. Of note, over 20% of sentinel specimens in Germany, Italy, and the Russian Federation tested positive for influenza, however, these increased sentinel detections of influenza virus were not associated with significant increases in overall rates of acute respiratory illness; in Italy and the Russian Federation, seasonal influenza B viruses were either dominant or co-dominant with pandemic H1N1, respectively. In Romania and in Poland, recent increases in rates of ILI or ARI have not been associated with increased detections of pandemic or other influenza viruses.

In North Africa and Western Asia, limited data suggests that pandemic influenza virus continues to circulate at low levels, as overall disease activity remained low across much of the region ... mehr

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Pandemic (H1N1) 2009 - update 94
Weekly update
01.04.2010 - WHO

As of 28 March 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 17483 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza virus transmission currently are in parts of the tropical zones of Asia, the Americas, and Africa. Pandemic influenza activity remains low in much of the temperate areas of both the northern and southern hemispheres. Although pandemic influenza virus continues to be the predominant influenza virus circulating worldwide, seasonal influenza type B viruses are predominant in much of East Asia, and have been increasingly detected at low levels across southeast and western Asia, East Africa, and in parts of eastern and northern Europe. Seasonal influenza A (H3N2) is still being detected in very small numbers in parts of Asia and Australia. [...]

[...] In North Africa and Western Asia, limited data suggests that pandemic influenza virus continues to circulate at low levels, as overall disease activity remained low across much of the region. In Iran, no pandemic influenza viruses have been detected recently, however, low levels of seasonal influenza B viruses continue to be detected.

In Sub-Saharan Africa, limited data suggests that pandemic influenza virus transmission remains variable but most active in western Africa and in limited areas of eastern Africa. Localized areas of active pandemic influenza transmission persist in areas of Eastern Africa, particularly Rwanda and Tanzania. Pandemic influenza virus continues to be the predominant influenza virus circulating in West and East Africa, however, small numbers of seasonal influenza H3N2, H1N1, and seasonal influenza B viruses have also been identified. [...]

[...] In Europe, low levels of pandemic influenza virus continue to circulate across the region, particularly across southern and eastern Europe. The proportion of sentinel respiratory samples testing positive for influenza remained low (4.6%). Three countries (Latvia, Lithuania and Bulgaria) reported an increasing trend of respiratory diseases activity, however, these trends have not been associated with increased detections of pandemic influenza virus. Increased circulation of seasonal influenza B virus has been observed in the Siberian and far eastern regions of the Russian Federation, and in Italy and Sweden, where it continues to be the predominant circulating virus (although at overall low levels) ... mehr

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Pandemic (H1N1) 2009 - update 95
Weekly update
09.04.2010 - WHO

As of 4 April 2010, worldwide more than 213 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 17700 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The current situation is largely unchanged since the last update. The most active areas of pandemic influenza virus transmission continue to be in parts of Southeast Asia, West Africa, and in the tropical zone of the Americas. In Chile, a country of the southern hemisphere temperate zone, there is evidence of early localized pandemic influenza virus transmission in advance of the usual start of the southern hemisphere winter influenza season. Seasonal influenza type B viruses continue to actively circulate in East Asia, but are also being detected at low levels across other parts of Asia and Europe. [...]

[...] In Sub-Saharan Africa, limited data suggests that active circulation of pandemic influenza virus continues across parts of West and west-central Africa, and to a lesser extent in limited areas of East Africa. During early to mid-March 2009, 23% of respiratory sample tested positive for influenza in both Cote d'Ivoire and Ghana (the majority of virus isolates were pandemic H1N1). In Senegal, pandemic influenza transmission remains active but may be declining as the rate of sentinel specimens testing positive for pandemic influenza fell from a peak of 67% during early February 2009 to 17% during the most recent reporting week. In Cameroon, 38% (13/34) of respiratory samples tested positive for influenza during the past two weeks, of which 71% were pandemic and 29% were seasonal influenza type B viruses. Localized areas of active pandemic influenza transmission persist in areas of Eastern Africa, particularly Rwanda and Tanzania. Pandemic influenza virus continues to be the predominant influenza virus circulating in West and East Africa, however, small numbers of seasonal influenza H3N2 viruses have also been identified.

In Europe, low levels of pandemic influenza virus continue circulate across limited areas of Europe. The overall proportion of sentinel respiratory samples testing positive for influenza remained low (6.2%); the total number of sentinel influenza type B virus detections exceeded that of pandemic influenza virus during the most recent reporting week. In Italy, 31% (9/29) of sentinel respiratory samples tested positive for influenza, all of which were seasonal influenza type B viruses. Most countries in the region reported a low intensity of respiratory diseases, and only Georgia reported geographically widespread influenza activity ... mehr

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Pandemic (H1N1) 2009 - update 96
Weekly update
16.04.2010 - WHO

As of 11 April 2010, worldwide more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 17798 deaths. WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza virus transmission currently are in parts of the tropical zones of the Americas, West Africa, Eastern Africa and South East Asia. Although pandemic influenza continues to be the predominant circulating influenza virus worldwide, seasonal influenza type B virus circulation continues to be predominant in East Asia, and is being detected across other parts of Asia, and Europe at low levels. Sporadic detections of seasonal influenza H3N2 viruses have been reported across Asia, Eastern Europe and Eastern Africa most notably in recent weeks in Indonesia and Tanzania. Few seasonal H1N1 viruses were reported in the Russian Federation and Northern China in the last week. [...]

[...] In Europe, pandemic influenza activity has continued to decrease in recent weeks and is at very low intensity in all countries. The overall proportion of sentinel respiratory samples testing positive for influenza remained low (5.4%), and the number of influenza type B virus detections exceeded that of influenza A. In Italy, 50% (7/14) of sentinel respiratory samples tested positive for influenza, all of which were seasonal influenza type B viruses. [...]

[...] In North Africa limited available data suggests that respiratory disease activity remained low. In sub-Saharan Africa, West Africa continues to see community transmission of pandemic influenza virus with Ghana currently being the primary focus of transmission (45% of all clinical specimens tested were positive for pandemic influenza) but smaller numbers of cases were also seen in Senegal and Niger. Pandemic influenza virus transmission appears to have peaked in Senegal approximately one month ago. Guinea has now reported their first cases of pandemic H1N1. In East Africa, cases of pandemic influenza H1N1 continue to be detected in Rwanda, though in declining numbers. Small numbers of seasonal influenza H3N2 and influenza type B viruses were detected during the last week in Rwanda, Kenya and South Africa. Notably, Tanzania has also recently reported significant transmission of seasonal influenza H3N2. No increases in respiratory disease activity or pandemic influenza have yet been noted in South Africa ... mehr

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Pandemic (H1N1) 2009 - update 97
Weekly update
23.04.2010 - WHO

As of 18 April 2010, worldwide more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 17853 deaths. WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and member states and through monitoring of multiple sources of information.

Situation update:

Summary: Currently the most active areas of transmission of pandemic influenza are in parts of West and Central Africa but transmission is also still occurring in South East Asia, and Central America. Pandemic influenza activity remains low in much of the temperate zone of both the northern and southern hemispheres. Seasonal influenza type B viruses have been increasingly detected over a larger area and are now the predominant circulating influenza viruses across East Asia, Central Africa and Northern and Eastern Europe. Very small numbers of type B viruses have also recently been detected in Central America. Seasonal influenza H3N2 is still being detected in South and Southeast Asia (mainly Indonesia), as well as sporadically in several countries of West Africa, and Eastern Europe.

In Europe, most countries reported a low intensity of respiratory diseases with only 6.8% of respiratory specimens testing positive for influenza. This week the total number of influenza B virus detections continued to exceed that of influenza A, as in recent weeks, although at low levels. Of note, some sporadic detections of seasonal H1N1 and H3N2 viruses were reported in Eastern Europe. [...]

[...] Limited available data from North Africa suggests that respiratory disease activity there remains low. In sub-Saharan Africa, available data suggests ongoing community transmission of pandemic influenza virus in West Africa. Transmission appears to have peaked in Senegal in February but Ghana continues to have active, though decreasing, transmission. Cote d`Ivoire and Niger reported increasing trends of respiratory disease activity but no virological data were available. In central Africa, low levels of pandemic influenza activity continue to be reported in Cameroon. In addition, small numbers of seasonal influenza H3N2 virus detections were reported by Angola. In eastern Africa, pandemic influenza virus continues to be detected in declining numbers in Rwanda with persistent reporting of small numbers of seasonal influenza H3N2 in Rwanda and Kenya. No increase in respiratory disease activity or detections of pandemic influenza viruses have yet been noted in Southern Africa. Influenza type B has been increasingly detected in some countries of central Africa ... mehr

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Pandemic (H1N1) 2009 - update 98
Weekly update
30.04.2010 - WHO

30 April 2010 -- As of 25th of April, worldwide more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 17919 deaths. WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and Member States and through monitoring of multiple sources of information.

Situation update:

The current situation is largely unchanged since the last update. The most active areas of transmission of pandemic influenza H1N1 virus continue to be parts of West and Central Africa with some focal areas of activity in South and Southeast Asia. Pandemic influenza activity H1N1 remains low in much of the temperate areas of both the northern and southern hemispheres. Seasonal influenza type B virus is the predominant influenza virus, though also at low levels of circulation, across East Asia, Northern and Eastern Europe. Influenza type B viruses have also been detected in Central Africa and this week in West Africa. Seasonal influenza H3N2 viruses have continued to be detected in South and Southeast Asia, as well as sporadically in some countries of West and Central Africa, and Eastern Europe.

In Sub-Saharan Africa, data from a limited number of countries suggests that active transmission of pandemic influenza H1N1 virus is declining across West and West-central Africa. Ghana is reporting moderate amounts of pandemic virus (16 % of all clinical specimens tested were positive for pandemic influenza) but smaller numbers of cases continue to be detected in Senegal, Niger and Cameroon. In East Africa, influenza activity has returned to low levels. Only Rwanda has detected small numbers of pandemic virus in the past week. In addition, a few seasonal influenza H3N2 viruses are seen in Ghana. Influenza type B has been increasingly detected in the area, notably in Ghana and Cameroon ... mehr

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Pandemic (H1N1) 2009 - update 99
Weekly update
07.05.2010 - WHO

As of 2nd April, worldwide more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 18001 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and Member States and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza virus transmission currently are in parts of West Africa, the Caribbean, and Southeast Asia. In the temperate zone of the northern and southern hemisphere, overall pandemic influenza activity remains sporadic. Seasonal influenza virus type B continues to be detected sporadically across Asia, Africa, Europe, and the Americas, however, low levels of late season virus circulation have primarily detected in East and Central Asia, southern Europe, and central Africa.

In Sub-Saharan Africa, limited data from several countries suggest that active transmission of pandemic influenza virus persists in parts of West Africa while low levels of seasonal influenza type B viruses continue to circulate in parts of central Africa. In Ghana, pandemic influenza virus detections may be declining after peaking during early April 2010; during the most recent reporting week, 14% of respiratory specimens tested positive for pandemic influenza virus. In Cameroon, low levels of pandemic and seasonal influenza type B virus continue to co-circulate, though the latter have been predominant during April 2010. In the Democratic Republic of Congo, circulation of seasonal influenza H3N2 viruses during February and mid-March 2010 has been largely replaced by circulation of seasonal influenza type B viruses during April 2010. Localized, low level pandemic influenza virus circulation continues to be observed in parts of East Africa, particularly in Rwanda and Tanzania. Sporadic detections of seasonal influenza H3N2 viruses continue to be reported across eastern, central, and western Africa. [...]

[...] In Europe, overall influenza activity remained low with very low level co-circulation of pandemic and seasonal influenza type B viruses. The overall proportion of sentinel respiratory samples testing positive for influenza remained stable at about 5.3%; and the total number of sentinel influenza B virus detections continued to exceed that of influenza A viruses, primarily due to low level seasonal influenza type B virus circulation in the Russian Federation and Kazakhstan ... mehr

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Bundesländern droht 236 Millionen Euro Verlust
Keine Käufer für den Schweinegrippen-Impfstoff
07.05.2010 - tagesschau

Alle Verhandlungen über den Verkauf von überschüssigen Schweinegrippen-Impfdosen sind bislang gescheitert. Das berichtet die "Westdeutsche Allgemeinen Zeitung". Nachdem sich in Deutschland nicht so viele Menschen impfen ließen wie erwartet, blieben etwa 30 Millionen Impfdosen übrig. "Die Chancen, den Impfstoff doch noch verkaufen zu können, werden natürlich mit jedem Tag geringer", sagte der Sprecher des niedersächsischen Gesundheitsministeriums, Thomas Spieker, und bestätigte damit den Zeitungsbericht ... mehr

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Pandemic (H1N1) 2009 - update 100
Weekly update
14.05.2010 - WHO

As of 9 May, worldwide more than 214 countries and overseas territories or communities have reported laboratory confirmed cases of pandemic influenza H1N1 2009, including over 18036 deaths.

WHO is actively monitoring the progress of the pandemic through frequent consultations with the WHO Regional Offices and Member States and through monitoring of multiple sources of information.

Situation update:

The most active areas of pandemic influenza virus transmission currently are in parts of the Caribbean and Central America, and to a lesser extent in West Africa and South and Southeast Asia. In the temperate zone* of the northern and southern hemisphere, overall pandemic influenza activity remains sporadic. Seasonal influenza virus type B continues to be detected at low levels across parts of Asia, Africa, and Europe [...]

In Sub-Saharan Africa, limited data from several countries suggest that active transmission of pandemic influenza virus continues to decline in parts of West Africa, while low levels of seasonal influenza type B viruses continue to circulate in parts of Central Africa and to a lesser extent in East Africa. In Ghana, pandemic influenza virus detections continued decline after peaking during early April 2010; during the most recent reporting week, 10%of respiratory specimens tested positive for pandemic influenza virus. There was no report of influenza activity in Senegal where a peak of pandemic influenza activity was observed in late February 2010. In central Africa, Cameroon continued to report co-circulation of pandemic and seasonal influenza type B viruses; the latter continued to be predominant during the most recent reporting week with approximately 31% of all respiratory samples testing positive for seasonal influenza type B and 4% testing positive for pandemic influenza virus. Sporadic detections of seasonal influenza H3N2 and influenza B viruses have been reported across eastern and western Africa over the past month [...]

In Europe, pandemic influenza virus continues to be detected sporadically as the overall intensity of respiratory diseases remained low across the continent. Low level circulation of seasonal influenza type B virus persists in parts of southern and eastern Europe, notable in the Russian Federation and in Italy. The Global Influenza Surveillance Network (GISN) continues monitoring the global circulation of influenza viruses, including pandemic, seasonal and other influenza viruses infecting, or with the potential to infect, humans including seasonal influenza. For more information on virological surveillance and antiviral resistance please see the weekly virology update (Virological surveillance data, below) ... mehr

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