July and August saw an outbreak of Influenza A variant virus infections in Michigan and Ohio. On Aug. 3, the Ohio Department of Health Laboratory reported to the Center for Disease Control that a respiratory specimen collected on July 28 tested positive for the virus. The 13-year-old male the specimen was collected from had recently attended an agricultural fair in Ohio and developed a respiratory illness as a result.

The next day, the CDC received notification that a 9-year-old swine exhibitor in Michigan tested positive for the same strain of influenza. Investigations throughout Michigan and Ohio identified 18 people with infections of the virus who had links to swine exhibits at agricultural fairs.

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