News from the FDA/CDC

U.S. flu activity continues to decline


 

The 2016-2017 U.S. influenza season appears to have peaked, as activity measures dropped for the third consecutive week, the Centers for Disease Control and Prevention reported.

For the week ending March 4, there were 11 states at level 10 on the CDC’s 1-10 scale of influenza-like illness (ILI) activity, with another three in the “high” range at levels 8 and 9. The previous week (Feb. 25), there were 22 states at level 10, with a total of 27 in the high range of ILI activity. At the peak of activity during the week of Feb. 11, there were 25 states at level 10, data from the CDC’s Outpatient ILI Surveillance Network show.

Influenza-like illness activity level, week ending March 4, 2017
The nationwide proportion of outpatient visits for ILI was 3.6% for the week ending March 4, the CDC reported, which was down from 4.7% the previous week and 5.2% during the peak week of Feb. 11.

There were eight ILI-related pediatric deaths reported during the week ending March 4, although all occurred in earlier weeks. For the 2016-2017 season so far, 48 ILI-related pediatric deaths have been reported, the CDC said.

For the 70 counties in 13 states that report to the Influenza Hospitalization Surveillance Network, the flu-related hospitalization rate for the season is 43.5 per 100,000 population. The highest rate by age group is for those 65 years and over at 198.8 per 100,000, followed by 50- to 64-year-olds at 42.2 per 100,000 and children aged 0-4 years at 28.8 per 100,000, according to the CDC.

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