However, over the last two weeks, more illnesses have been tied to the Type A H3N2 strain, which poses a more significant risk to the elderly.
It's unclear whether the season has peaked, but there are still weeks of flu activity to come this season, with 48 states and Puerto Rico reporting widespread activity. And for the week ending March 2, three versions of the flu continue to circulate. Dr. Howard says the type A strain created one of the worst flu seasons on record past year.
For the second week in a row, H3N2 viruses were reported more frequently than 2009 H1N1, which had been predominant across the season. The highest hospitalization rate last week occurred among adults 65 and older, at 107.7 per 100,000 population.
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Last season, an estimated 80,000 Americans died of flu and its complications, the disease's highest death toll in at least four decades. If you get these symptoms, get medical advice.
CDC health officials say the flu vaccination is your best defense against the flu.
"Although it's not ideal, it still prevents many, many infections, and even if you should get influenza despite having received the vaccine, it tends to make a less severe infection".