2017-2018 Estimated Influenza Illnesses, Medical visits, and Hospitalizations Averted by Vaccination in the United States

In partnership with academic and public health colleagues, CDC recently published an article in the journal Clinical Infectious Diseasesexternal icon describing the effectiveness of the influenza vaccine and the number of illnesses, hospitalizations, and deaths prevented by flu vaccine during the 2017–2018 flu season.

The authors found that the flu vaccine reduced the chances of getting sick and going to the doctor for flu by 38% (95% confidence interval: 31–43%).

The authors used a mathematical model, combining the vaccine effectiveness, estimated vaccine coverage, and influenza burden, and estimated that influenza vaccination prevented 7.1 million illnesses, 3.7 million medical visits, 109,000 hospitalizations, and 8,000 deaths associated with flu.

Influenza vaccination was more effective against medical visits due to influenza A(H1N1)pdm09 (62%) and influenza B (50%). And flu vaccination was also more effective in young children. In fact, the authors estimated that flu vaccine prevented approximately 40% of deaths due to flu in children younger than 5 years.

The 2017–2018 flu season in the U.S. was severe for people of all ages. The immense burden and the burden prevented by vaccination highlight the importance of getting an annual influenza vaccine to protect yourself against influenza and complications from the flu.

Full article is available through the journal Clinical Infectious Disease, Effects of Influenza Vaccination in the United States during the 2017–2018 Influenza Seasonexternal icon.

The benefits of flu vaccination 2017-2018

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The Benefits of Flu Vaccination 2017-2018 Infographic (Text Version)

The estimated number of flu illnesses prevented by flu vaccination during the 2017-2018 season: 7 million, about the population of New York City.

[Illustration of the New York City skyline.]

The estimated number of flu hospitalizations prevented by vaccination during the 2017-2018 season: 109,000, or about the number of vehicles crossing the Golden Gate Bridge each day.

[Illustration of the Golden Gate Bridge.]

The estimated number of flu deaths prevented by vaccination during the 2017-2018 season: 8,000, or twice the number of hospitals in the U.S.

[Illustration of a hospital and hospital beds in the foreground.]

DATA: Journal Clinical Infectious Disease, E-ects of Inuenza Vaccination in the United States during the 2017–2018 Inuenza Season, https://doi.org/10.1093/cid/ciz075external icon

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