GENEVA - The number of swine flu deaths jumped by 700 in a week, reaching more than 5,700 worldwide since the virus was first uncovered in April, World Health Organization data indicated Friday.
The biggest rise was recorded in the Americas region, where 4,175 deaths have now been reported to the WHO, up 636 from data published last week.
"In the temperate zone of the northern hemisphere, influenza transmission continues to intensify, marking an unusually early start to winter influenza season in some countries," said the WHO.
Fatal cases in Europe rose to at least 281, while those in Asia-Pacific rose to 1,070.
Amid the mounting death toll, the WHO said a single dose of vaccine would provide sufficient immunity.
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