2013-2014 Estimated Influenza Illnesses, Medical Visits, Hospitalizations, and Deaths Averted by Vaccination in the United States

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CDC estimates that influenza vaccination during the 2013-2014 influenza season prevented 7.5 million illnesses, 3.5 million medical visits, 100,000 hospitalizations and 12,000 deaths associated with influenza (Table: Estimated Number of Influenza Illnesses, Medical Visits, Hospitalizations, and Deaths Averted by Vaccination, 2010-11 through 2017-18 Influenza Seasons).

Table 1: Estimated Number of Influenza Illnesses, Medical Visits, Hospitalizations, and Deaths Averted by Vaccination, by Age Group — United States, 2013-2014 influenza season
Averted illnesses Averted medical visits Averted hospitalizations Averted deaths
Age group Estimate 95% UI* Estimate 95% UI* Estimate 95% UI* Estimate 95% UI*
6 mo-4 yrs 900,201 (268,501, 1,909,340) 603,134 (187,774, 1,259,048) 6,276 (1,872, 13,311) 26 (0, 100)
5-17 yrs 1,216,774 (522,535, 1,936,802) 632,723 (288,244, 966,485) 3,336 (1,433, 5,311) 17 (0, 83)
18-49 yrs 2,307,412 (1,447,369, 4,143,761) 853,743 (556,193, 1,506,257) 12,952 (8,124, 23,259) 606 (328, 1,282)
50-64 yrs 2,532,448 (1,432,428, 4,698,955) 1,088,953 (649,472, 1,939,135) 26,856 (15,191, 49,831) 1,780 (931, 3,701)
65+ yrs 585,101 (22,681, 2,037,891) 327,657 (13,645, 1,097,700) 53,191 (2,062, 185,263) 9,737 (397, 37,336)
All ages 7,541,936 (4,298,163, 12,087,097) 3,506,209 (1,996,791, 5,480,180) 102,611 (34,696, 253,332) 12,166 (2,333, 40,943)

* Uncertainty Interval

Table 2: Estimated Fraction of  Influenza Hospitalizations Averted by Vaccination by age group — United States, 2013-2014 influenza season
Age Group Estimate 95% UI*
6 mo-4 yrs 39 (16, 53)
5-17 years 26 (13, 35)
18-49 years 18 (14, 22)
50-64 years 26 (18, 32)
65+ years 28 (1, 43)

*Uncertainty Interval