
The 2013 flu season is forecasted to be a particularly harsh one due to the aggressive flu strain designated as H3N2.
See the article here:
CDC EStimates Over 200,000 Will Be Hospitalized in 2013 Due to H3N2 Influenza Outbreak

The 2013 flu season is forecasted to be a particularly harsh one due to the aggressive flu strain designated as H3N2.
See the article here:
CDC EStimates Over 200,000 Will Be Hospitalized in 2013 Due to H3N2 Influenza Outbreak