CDC Flu Update for Week 44

According to this week’s CDC FluView report for week 44, ending Nov. 2, 2019, seasonal influenza activity in the United States remains low but is increasing.

3.2% of respiratory specimens tested by clinical laboratories were positive for influenza viruses. This is higher than the previous week.

Nationally, A(H3N2) and B/Victoria viruses have been most common; however, A(H1N1)pdm09 viruses also circulated. The predominant virus varies by region.

2.1% of visits to a healthcare provider were for influenza-like illness (ILI). ILI activity is higher than the previous week but remains below the national baseline of 2.4%.

The majority of jurisdictions experienced minimal ILI activity; however, Louisiana and Puerto Rico experienced high ILI activity and 9 states experienced low ILI activity.

The majority of jurisdictions reported sporadic or local activity. Three states reported regional or widespread activity, and one state reported no activity.

No new influenza-associated pediatric deaths occurring during the 2019-2020 season were reported to CDC this week. The total for the season is 2.

An overview of the CDC influenza surveillance system, including methodology and detailed descriptions of each data component, is available at

Source: CDC

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