Figure 4From: Potential for early warning of viral influenza activity in the community by monitoring clinical diagnoses of influenza in hospital emergency departments Comparison of unlagged predicted values for the smoothing spline component of the fitted Poisson regression models, representing medium to long-term trends of the Emergency Department ('ED') and laboratory ('Lab') series by year. Y-axis scales are chosen to give a similar range for both ED and laboratory series in each year to allow comparison of trend rather than absolute magnitude of the series over time.Back to article page