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Michigan Influenza Hospitalization Surveillance Project (IHSP)

Michigan Influenza Hospitalization Surveillance Project (IHSP)

The CDC’s Influenza Hospitalization Surveillance Network (FluSurv-NET) provides population-based rates of laboratory-confirmed influenza-associated hospitalizations among children and adults starting October 1st of each year. Michigan participates in FluSurv-NET for Clinton, Eaton, Genesee, Ingham, Livingston and Washtenaw Counties.

A case is defined as a person who:

  • is a resident in the defined catchment area
  • is hospitalized
  • tests positive for influenza by a laboratory test within 14 days prior to or during hospitalization

FluSurv-NET is CDC’s source for important data on hospitalization rates associated with influenza. FluSurv-NET also provides demographic and clinical information including age, sex and underlying medical conditions among persons hospitalized with influenza. Data gathered are used to estimate age-specific hospitalization rates on a weekly basis and to describe characteristics of influenza-associated hospitalizations, as reported in CDC’s FluVIew. 

FluSurv-NET is part of the Respiratory Hospitalization Surveillance Network (RESP-NET), which is made up of three networks that also monitor laboratory-confirmed hospitalizations associated with influenza (FluSurv-NET), COVID-19 (COVID-NET), and RSV (RSV-NET).