Influenza and other viruses in the acutely ill (IVY) adult inpatient vaccine effectiveness surveillance

Funded by the Centers for Disease Control, the IVY network was initially created in 2019 to estimate how well influenza (flu) vaccines work at preventing severe flu illness among intensive care unit (ICU) patients. IVY has expanded to evaluate additional viruses including SARS-CoV-2 and RSV.The Center has been a participating site in the IVY Network since 2021. More information about the IVY Network.

Recent IVY Network Publications

​​Effectiveness of Pfizer-BioNTech and Moderna Vaccines Against COVID-19 Among Hospitalized Adults Aged ≥65 Years (PDF) — United States, January–March 2021