Influenza continues to spread as widespread activity has been reported in 35 states, the CDC reported.
For the week ending Jan., the proportion of people seeing their health care provider for influenza-like illness decreased, likely because of the holidays, but remained above the national baseline.
Twenty states had high flu-like illness levels, and 35 states reported widespread geographic influenza activity, an increase from 25 states that reported widespread activity last week.
There has been a cumulative rate of 9.7 hospitalizations per 100,000 people in the United States for this entire flu season. More than 60% have been in people 18 to 64 years old, similar to the pattern seen in the 2009 H1N1 pandemic.