CDC Flu Update for Week 45

According to this week’s CDC FluView report for Week 45, ending Nov. 9, 2019, seasonal influenza activity in the United States is increasing.

Nationally, B/Victoria viruses are predominant; however, A(H3N2) and A(H1N1)pdm09 viruses are also circulating widely. The predominant virus varies by region and age.

2.3% of visits to a healthcare provider were for influenza-like illness (ILI). Nationally, ILI was below the baseline (2.4%); however, 4 of 10 regions were at or above their baselines.

The majority of jurisdictions experienced minimal ILI activity; however, Louisiana experienced high ILI activity and 14 jurisdictions experienced moderate or low ILI activity. The majority of jurisdictions reported sporadic or local activity. Ten states reported regional or widespread activity, and one state reported no activity.

4.9% of deaths were attributed to pneumonia and influenza (P&I). This is below the epidemic threshold of 6.0%.

One new influenza-associated pediatric death occurring during the 2019-2020 season was reported to CDC this week. The total for the season is 3.

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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