NEW: Questions and Answers: Behavioral Risk Factor Surveillance System (BRFSS) 2009 H1N1 Flu Modules for Influenza-like Illness (ILI) and Vaccination

This page provides a summary of the Behavioral Risk Factor Surveillance System (BRFSS) and how it helps track influenza activity.

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NEW: Questions and Answers: Behavioral Risk Factor Surveillance System (BRFSS) 2009 H1N1 Flu Modules for Influenza-like Illness (ILI) and Vaccination