The US flu season is already a long one, with illness activity still widespread in 44 states and expected to continue for several more weeks, the Centers for Disease Control and Prevention (CDC) said in its latest weekly update.
Though the level of clinic visits for flu peaked in February, the latest markers show little change from the previous week, with H3N2 viruses causing an increasing number of infections. Though 2009 H1N1 has been predominant for most of the season, H3N2 has caused more illnesses for 3 weeks in a row now.
The CDC said the most recent flu seasons have averaged 16 weeks above baseline for flulike illness, but so far this season, flu levels have topped baseline for 17 weeks. Also, the agency recorded eight new flu-related deaths in children.
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