Four cases of influenza have been detected in southeast Michigan. The exact locations haven't been disclosed.
These are the first flu cases of the season. The illnesses occurred in both children and adults.
The cases of flu are two different types. Three have been confirmed as influenza A (H1N1) 2009 viruses and one as an influenza A (H3N2) virus.
The Centers for Disease Control and Prevention will report Michigan's flu activity as "sporadic", the second lowest of five influenza activity categories.
The Michigan Department of Community Health is encouraging everyone to get a flue shot.