Surge seen in seasonal flu in Hong Kong

There were 85 influenza detections last week compared with 44 from February 14 to 20. The majority were influenza B virus (63.5%) while human swine influenza virus accounted for 22.4% and influenza A (H3N2) virus about 1% of all isolates. The currently used seasonal influenza vaccine for the 2009-10 northern hemisphere influenza season is expected to confer certain cross protection against this influenza B virus.

via Surge seen in seasonal flu.