Global flu levels high, increased flu B in Northern Hemisphere
Flu levels in the Northern Hemisphere continued to rise, especially in Europe and North America, with high but stabilizing activity noted in areas of northern Asia and the Middle East, the World Health Organization (WHO) said in a Mar 7 update.
The 2009 H1N1 virus is the predominant strain worldwide, though the proportion of influenza B detections has increased recently in several regions.