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The H1N1 virus is commonly greatest in quantity effective in parts of Europe, North Africa and South Asia, the World Health Organization says.

Swine flu has killed at least 12,799 people worldwide subsequently to it highest emerged in Mexico in March 2009, WHO said Friday in its weekly pandemic update on lab-confirmed cases. At least 2,554 of the deaths were in Europe.

The reckon of deaths increased by dint of. 579 since the last update published nine days ago.

More than moiety of the deaths, at least 6,880, have been in the Americas. Overall pandemic flu activity continued to decline or remain low in both the metaphorical and arctic temperate zones of the Americas, WHO said.

In North America, peak influenza activity occurred during early October in Mexico, followed by the United States and Canada in the something intermediate and recently part of the month.

The greatest in quantity active areas of pandemic influenza transmission publicly are in parts of central, eastern and southeastern Europe, North Africa, and South Asia.

Poland, Serbia, Ukraine and Georgia recently reported high respiratory disease activity.

Pandemic influenza transmission is in like manner widespread and agile in northern India, Nepal, and in Sri Lanka. The sort is correct in East Asia, where flu spread appears to be declining overall, the WHO said.

Southern hemisphere immunity

In the southern hemisphere, H1N1 is now spreading less amid people who were already exposed to it for the time of the boreal hemisphere’s summer of 2009.

“In temperate regions of the south half-globe, single cases of pandemic influenza continued to be reported free from proof of sustained common transmittance,” it before-mentioned.

“This suggests that the level of population prerogative in areas that experienced intense, high-level transmission during a hibernate tinge is high enough to prevent sustained transmission from returning during the summer when the virus is less transmissible.”

Also on Friday, the European Center for Disease Prevention and Control warned governments to continue H1N1 flu vaccination programs and to watch for mutations in the poison and new strains.

“The historical original of human influenzas is that after pandemics, the world experiences a new be joined of viruses,” the centre’sitting flu expert Angus Nicoll wrote in the Eurosurveillance philosophical journal.

In the 1957-58 flu pandemics, in that place were increases in flu-related deaths in the new year.

It’sitting estimated that between 250,000 and 500,000 people worldwide die from steady flu each year, including 4,000 to 8,000 in Canada, according to the WHO and the Public Health Agency of Canada.