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Flu hits working-age adults in Wisconsin particularly hard this season

January 24, 2014
by Mark Johnson
Milwaukee Journal Sentinel

But H1N1 reappeared in 1977 and again in 2009. The flu's history means that people 58 years and older likely built immunity from the days when H1N1 was the dominant strain.

"They had a lot of immunity on board from their early childhood, which seems to be important," Finelli said.

In addition, the elderly tend to have better vaccination rates, along with children. Earlier this month, Wisconsin was named one of the worst in the nation for flu vaccination rates for adults ages 18 to 64 by Trust for America's Health. For those over age 65, the vaccination rate jumped higher than 60%, according to the report.

The result, Finelli said, is that young and middle-age adults "have the lowest levels of immunity and the lowest levels of vaccinations."

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