CENTERS FOR DISEASE CONTROL AND PREVENTION
According to the FluView report for the week ending May 20, 2017 (week 20), flu activity continues to decrease in the United States. The 2016-2017 flu season is winding down, however flu activity persists in some areas.
As of May 20, 2017, 18,256 laboratory-confirmed influenza-associated hospitalizations occurring between October 1, 2016, and April 30, 2017, have been reported through the Influenza Hospitalization Surveillance Network. This translates to a cumulative overall rate of 65.2 hospitalizations per 100,000 people in the United States. This is higher than the cumulative hospitalization rate for the 2012-2013 flu season (44.0 per 100,000), when influenza A (H3N2) viruses also predominated, and is slightly higher than the cumulative hospitalization rate during 2014-2015 (64.1 per 100,000) which also was an H3N2 predominant season.
- The hospitalization rate among people 65 years and older is 291.1 per 100,000. This is the highest rate of any age group. The hospitalization rate for people 65 and older for the same week during the 2012-2013 flu season was 183.9 per 100,000. For week 17 during 2014-2015, it was 308.8 per 100,000.
- The hospitalization rate among adults 50-64 years is 65.1 per 100,000. This is the highest hospitalization rate ever observed for this age group since this type of surveillance began. During the 2012-2013 and 2014-2015 flu seasons, the hospitalization rate for that age group for the same week was 40.9 per 100,000 and 53.4 per 100,000 respectively.
- The hospitalization rate among children younger than 5 years is 45.1 per 100,000. During the 2012-2013 and 2014-2015 flu seasons, the hospitalization rate for that age group for the same week was 67.0 per 100,000 and 57.2 per 100,000 respectively.
- During most seasons, children younger than 5 years and adults 65 years and older have the highest hospitalization rates.
- Hospitalization data are collected from 13 states and represent approximately 9% of the total U.S. population. The number of hospitalizations reported does not reflect the actual total number of influenza-associated hospitalizations in the United States.