Ten states were experiencing widespread flu activity, while 40 states were experiencing sporadic, local, or regional flu activity as of Nov. 23, according to the latest CDC data.
Infographic: How to avoid the flu when you fly
Flu activity so far
According to Friday's Weekly Influenza Surveillance report from CDC, Alabama, Alaska, California, Louisiana, Massachusetts, Nevada, New Mexico, South Carolina, Tennessee, and Texas were all experiencing widespread flu activity in the week ending in Nov. 23.
Meanwhile, 33 states were experiencing local or regional flu activity. The remaining states were experiencing sporadic activity.
CDC has not yet released estimates of how many people have contracted the flu, nor has it released data on how many medical visits or hospitalizations the flu has led to so far this season. CDC said it will release that data "when activity has been sufficient to generate a stable estimate."
However, CDC said public health laboratories nationwide reported 504 positive respiratory specimens for influenza A and 1,198 positive specimens for influenza B in the week ending in Nov. 23. CDC said 7,361 positive influenza specimens have been reported since Sept. 29.
CDC also said the percentage of outpatient visits for flu-like illness rose 0.4 percentage points, reaching 2.9% for the week ending in Nov. 23. That figure is above the national baseline of 2.4%.
In addition, CDC said that one influenza-associated pediatric death was reported during the week ending in Nov. 23. So far, the 2019-2020 flu season has seen a total of five influenza-associated pediatric deaths (CDC Weekly U.S. Influenza Surveillance Report, 11/23; CDC Flu Season FAQ, accessed 12/2).