Respiratory Viruses

CDC’s efforts with forecasting began in 2013 with the “Predict the Influenza Season Challenge”, a competition that encouraged outside academic and private industry researchers to forecast the 2013–14 flu season. Each flu season after, CDC’s Influenza Division collaborated with external researchers on flu forecasting. CDC has provided forecasting teams data, relevant public health forecasting targets, and forecast accuracy metrics while teams submit their forecasts, which are based on a variety of methods and data sources, each week.

Weekly U.S. influenza surveillance report. Updated every Friday afternoon.

The Influenza Hospitalization Surveillance Network (FluSurv-NET) is a population-based surveillance system that collects data on laboratory-confirmed influenza-associated hospitalizations among children and adults through a network of acute care hospitals in 14 states.

An online application which allows for more in-depth exploration of influenza surveillance data, are updated each week.

A Weekly Influenza Surveillance Report Prepared by the Influenza Division
Outpatient Respiratory Illness Activity Map Determined by Data Reported to ILINet

View national, regional, and state-level influenza vaccination coverage estimates for the general population, health care personnel, nursing home residents, and pregnant women using interactive maps, trend lines, bar charts, and data tables.

Global influenza surveillance has been conducted through WHO's Global Influenza Surveillance and Response System (GISRS) since 1952.

GISRS is a system fostering global confidence and trust for over half a century, through effective collaboration and sharing of viruses, data and benefits based on Member States’ commitment to a global public health model.