Estimated Influenza Illnesses, Medical visits, and Hospitalizations Averted by Vaccination
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For the past several years, CDC has estimated the burden of influenza and the impact of annual influenza vaccination in the United States. CDC finds these estimates using a model that estimates the numbers of flu illnesses, medical visits and hospitalization prevented by vaccination using season-specific data on burden of disease, vaccine coverage and vaccine effectiveness (VE). Variations in these three inputs can impact both the burden of disease and the burden averted by vaccination from season to season. CDC uses the estimates of the burden of influenza in the population and the impact of influenza vaccination to inform policy and communications related to influenza.
Supporting Research
Flu-related illness and hospitalization averted by vaccination
2016-2017 season
- Study: Estimated Influenza Illnesses, Medical visits, and Hospitalizations Averted by Vaccination in the United States. CDC web site.
2015-2016 season
- Study: Estimated Influenza Illnesses, Medical Visits, Hospitalizations, and Deaths Averted by Vaccination in the United States. CDC web site.
- Web article: CDC: Flu Vaccine Protected Millions Last Season; Vaccine Coverage Remains Low.
2014-2015 season
- Study: Estimated Influenza Illnesses and Hospitalizations Averted by Vaccination — United States, 2014–15 Influenza Season. CDC web site.
- Web article: Fewer Than Half of Americans Report Having Gotten A Flu Vaccine this Season.
2013-2014 season
- Study: Estimated Influenza Illnesses and Hospitalizations Averted by Vaccination — United States, 2013–14 Influenza Season. MMWR.
- Web article: New CDC Report Shows Benefits of Flu Vaccine Last Season But Fewer Than Half of Americans Say They Have Been Vaccinated This Season.
2012-2013 season
- Study: Estimated influenza illnesses and hospitalizations averted by influenza vaccination—United States, 2012–13 influenza season. MMWR.
- Web article: New Report Cites Benefits of Flu Vaccine Yet More Than Half of Americans Remain Unvaccinated.
- Study: Modeling the Effect of Different Vaccine Effectiveness Estimates on the Number of Vaccine-Prevented Influenza-Associated Hospitalizations in Older Adults [136 KB, 4 pages]. Clin Infect Dis.
- Web article: CDC Study Concludes Flu Vaccination Prevents Hospitalizations in Older People.
2011-2012 season
- Study: Effectiveness of influenza vaccine for preventing laboratory-confirmed influenza hospitalizations in adults, 2011-2012 influenza season [88 KB, 4 pages]. Clin Infect Dis.
- Web article: Study Shows Flu Vaccination Prevents Hospitalizations in Older Adults.
2005-2011 seasons
- Study: Case-control study of vaccine effectiveness in preventing laboratory-confirmed influenza hospitalizations in older adults, United States, 2010-2011. Clin Infect Dis.
- Web article: New CDC Study: Influenza Vaccination Reduces Risk of Hospitalization By More Than Half Among Seniors.
- Study: Influenza Illness and Hospitalizations Averted by Influenza Vaccination in the United States, 2005-2011. PLoS One.
- Web article: CDC Study Shows Flu Vaccination Prevents Significant Flu Illness, Doctor’s Visits and Hospitalizations.
Flu-related deaths averted by vaccination
Infographic
- Page last reviewed: July 16, 2018
- Page last updated: July 16, 2018
- Content source:
- Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD)
- Page maintained by: Office of the Associate Director for Communication, Digital Media Branch, Division of Public Affairs