Pandemic (H1N1) 2009 - update 100 Weekly update
14 May 2010 -- 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 the tropical region of the Americas, pandemic influenza virus transmission remains most active in parts of the Caribbean, and to a lesser extent in Central America. In Cuba, pandemic influenza activity continued to decline after a recent period of intense transmission which began during late February 2010 and may have peaked during late April 2010.
Geographically widespread pandemic influenza activity was reported in Jamaica (during much of February through May 2010) and in the Dominican Republic (since late April); however, other respiratory viruses are known to be co-circulating in the region and overall respiratory disease activity during this period was reported to remain low to moderate.
The overall SARI** rate from sentinel sites in selected Caribbean countries (Dominica and Jamaica) increased since mid April 2010, however, the extent to which this was due circulating pandemic influenza virus versus other respiratory viruses is not known.
In Central America and the tropical regions of South America: Nicaragua, Honduras, Guatemala, Columbia, Bolivia, and Peru all reported regional spread of influenza during one or more weeks since late April 2010 suggesting that low levels of circulating pandemic influenza virus persist in the region.
In addition, there is evidence from several countries in this region that there is ongoing co-circulation of influenza with other respiratory viruses (including respiratory syncytial virus (RSV), and adenovirus).