Influenza vaccination was associated with lesser incidence of influenza-like illness near to statistical significance (adjusted odds ratio: 0.29; 95% CI 0.08–1.03).
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Household transmission of influenza A(H1N1)pdm09 in the pandemic and post-pandemic seasons.
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The sentences
In the 2009–2010 season, a decreasing trend of the SAR was observed with increasing age of the contacts: 32% in children under 5 years, 26% in persons between 5 and 17 years old, 10% in persons between 18 and 49 years, and 7% in persons age 50 or older.