Forecasts of Flu Hospitalizations April 25, 2022
Updated April 26, 2022
Reported and forecasted new influenza hospitalizations as of April 25, 2022.
Interpretation of National Forecasts of New Hospitalizations
- This week’s ensemble predicts that the number of new weekly confirmed influenza hospital admissions will remain stable or have an uncertain trend nationally, with 1,700 to 4,800 new confirmed influenza hospital admissions likely reported in the week ending May 21, 2022.
- This week, 15 modeling groups contributed one or more forecasts that were eligible for inclusion in the new hospitalization ensemble forecasts for at least one jurisdiction. Contributing teams are listed below.
- Ensemble forecasts combine diverse independent team forecasts into one forecast. They have been among the most reliable forecasts in performance for previous influenza and COVID-19 forecasts, but even the ensemble forecasts may not reliably predict rapid changes in the trends.
- The figure shows the number of new confirmed influenza hospital admissions reported in the United States each week from September 26 through April 23 and forecasted new influenza hospital admissions per week over the next 4 weeks, through May 21. Effective February 2, 2022, hospitals are required to report laboratory-confirmed influenza hospitalizations to HHS Protect daily. Prior to this update, reporting influenza hospitalizations was optional (noted as grey in the above figure). See COVID-19 Guidance for Hospital Reporting and FAQs for additional details on this guidance.
- The figure shows the number of new confirmed influenza hospital admissions reported in the United States each week from September 26 through April 9 and forecasted new influenza hospital admissions per week over the next 4 weeks, through May 7. Effective February 2, 2022, hospitals are required to report laboratory-confirmed influenza hospitalizations to HHS Protect daily. Prior to this update, reporting influenza hospitalizations was optional (noted as grey in the above figure). See COVID-19 Guidance for Hospital Reporting and FAQs for additional details on this guidance.
State Forecasts
State-level forecasts show the predicted number of new influenza hospital admissions per week for the next 4 weeks by state. Each state forecast figure uses a different scale due to differences in the number of new influenza hospital admissions per week between states and only forecasts included in the ensemble are shown. Plots of the state-level ensemble forecasts and the underlying data can be downloaded below.
Download state forecasts [PDF – 1,014 KB]
Download all forecast data [XLS – 365 KB]
Additional forecast data and information about submitting forecasts are available at https://github.com/cdcepi/Flusight-forecast-data.
Contributing Teams
Carnegie Mellon Delphi Group (Model: CMU-TimeSeries)
Columbia University (Model: CU-ensemble)
Georgia Institute of Technology (Model: GT-FluFNP)
Guidehouse FluSight Team (Model: GH-Flusight)
IEM Health (Model: IEM_Health-FluProject)
Los Alamos National Lab and Northern Arizona University (Model: LosAlamos_NAU-CModel_Flu)
LU Computational Uncertainty Lab (Model: LUcompUncertLab-humanjudgment)
LU Computational Uncertainty Lab (Model: LUcompUncertLab-TEVA)
MOBS Lab at Northeastern (Model: MOBS-GLEAM_FLUH)
Predictive Science Inc (Model: PSI-DICE)
Signature Science (Model: SigSci-CREG)
Signature Science (Model: SigSci-TSENS)
Srivastava Group (Model: SGroup-RandomForest)
Srivastava Group (Model: SGroup-SIkJalpha)
University of Georgia Center for the Ecology of Infectious Diseases Forecasting Working Group (Model: CEID-Walk)
University of Massachusetts-Amherst (Model: ARIMA)
University of Massachusetts-Amherst (Model: UMass-trends_ensemble)
University of Texas FluCast (Model: UT_FluCast-Voltaire)
University of Virginia, Biocomplexity Institute (Model: UVAFluX-Ensemble)
