Household Transmission of Influenza Viruses in the Community

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Households constitute up to 30% of influenza virus transmission and monitoring influenza in households is important to track how influenza spreads among close contacts and to understand the clinical spectrum of influenza infection and disease. The purpose of this project is to enroll households with confirmed influenza and follow household contacts for up to two weeks to estimate the secondary infection risk and factors associated with risk of infection. This study will also estimate the effectiveness of the influenza vaccine in preventing influenza infection from close contacts. These findings are important to improve prevention and control of seasonal influenza, but also to be better prepared in the event of a future influenza pandemic.

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