Washtenaw County Influenza Surveillance – 1/2/15

Lab-confirmed Cases: Reports of confirmed influenza in Washtenaw County residents are extremely high, with almost 300 new cases reported in the week ending December 27. The predominant strain being reported locally is A/H3N2, with a few cases of influenza B reported as well. The age range of confirmed flu cases is 1 month to 100 years old. Please see the local flu curve:

Hospitalizations and Deaths: Flu-related hospitalizations in Washtenaw residents reached a new weekly high, with 78 admissions last week. This is almost the same number of local flu-related hospitalizations reported during the entire second wave of the 2009 pandemic (84 hospitalizations from Sept 2009 – Jan 2010). The majority of local hospitalizations (74%) this flu season continue to be in individuals 65 yrs and older, with 30% of hospitalizations in those 85 yrs and older.

Unfortunately, the first flu-related deaths in Washtenaw residents for the 2014-15 season were reported this week. All four individuals were confirmed with influenza A. They were aged 55 years and older.

Hospitalizations and Deaths in Washtenaw Residents with Confirmed Influenza

Total Hospitalizations (*starting September 28, 2014)

Hospitalizations Week of 12/21 – 12/27/14

Child Deaths*
(0 – 17 years)

Adult Deaths*
(18 years and older)

Facility outbreaks: In the past several weeks, 6 long-term care and/or senior living centers have reported flu outbreaks. All outbreaks have been due to influenza A.

Providers should continue to promote vaccination. Washtenaw County Public Health still has flu vaccine available for all ages. Please call (734) 544-6700 for an appointment.

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