Estimates of influenza vaccine coverage from Victorian surveillance systems based in the community, primary care and hospitals.

Victoria has a number of complimentary surveillance systems for influenza. Flutracking,1 an online national community influenza-like illness (ILI) surveillance system, includes Victorian participants; the Victorian Sentinel Practice Influenza Network (VicSPIN)2 records patients attending general practice clinics throughout the state; and 4 large Victorian hospitals contribute to an Australia-wide adult hospital-based sentinel surveillance system, the Influenza Complications Alert Network (FluCAN).3 Although these systems primarily collect data on influenza cases to inform public health action, they also collect influenza vaccine status in non-cases, which allows estimation of vaccine coverage and effectiveness.