Papers › Does Spatial Information Improve Influenza Forecasting?
Does Spatial Information Improve Influenza Forecasting?
Gabrielle Thivierge, Aaron Rumack, F. William Townes
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Seasonal influenza forecasting is critical for public health and individual decision making. We investigate whether the inclusion of data about influenza activity in neighboring states can improve point predictions and distribution forecasting of influenza-like illness (ILI) in each US state using statistical regression models. Using CDC FluView ILI data from 2010-2019, we forecast weekly ILI in each US state with quantile, linear, and Poisson autoregressive models fit using different combinations of ILI data from the target state, neighboring states, and US weighted average. Scoring with root mean squared error and weighted interval score indicated that the variants including neighbors and/or the US average showed slightly higher accuracy than models fit only using lagged ILI in the target state, on average. Additionally, the improvement in performance when including neighbors was similar to the improvement when including the US average instead, suggesting the proximity of the neighboring states is not the driver of the slight increase in accuracy.
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