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United States influenza statistics by flu season

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The different sites of infection (shown in red) of seasonal H1N1 versus avian H5N1. This influences their lethality and ability to spread.

US influenza statistics by flu season. From the Centers for Disease Control and Prevention page called "Disease Burden of Flu": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of flu illnesses, medical visits, hospitalizations, and deaths related to flu that occurred in a given season. The methods used to calculate these estimates are described on CDC’s webpage, How CDC Estimates the Burden of Seasonal Flu in the U.S."[1][2][3]

The tables below include the latest available years the CDC has provided on their website.[1]

Hospitalizations and deaths

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  • UI = uncertainty interval.
  • Row numbers are static. Other columns are sortable. This allows ranking of any column.

* 2019 to 2020 season is a preliminary estimate.

Estimated Influenza Disease Burden – United States[1]
Season Hospitalizations Deaths
Estimate 95% UI Estimate 95% UI
2010-2011 290,000 (270,000 – 350,000) 37,000 (32,000 – 51,000)
2011-2012 140,000 (130,000 – 190,000) 12,000 (11,000 – 23,000)
2012-2013 570,000 (530,000 – 680,000) 43,000 (37,000 – 57,000)
2013-2014 350,000 (320,000 – 390,000) 38,000 (33,000 – 50,000)
2014-2015 590,000 (540,000 – 680,000) 51,000 (44,000 – 64,000)
2015-2016 280,000 (220,000 – 480,000) 23,000 (17,000 – 35,000)
2016-2017 500,000 (380,000 – 860,000) 38,000 (29,000 – 61,000)
2017-2018 710,000 (560,000 – 1,100,000) 52,000 (37,000 – 95,500)
2018-2019 380,000 (300,000 – 660,000) 28,000 (19,000 – 97,000)
2019-2020* 380,000 (312,000 – 630,000) 20,000 (18,000 – 80,000)

Symptomatic illnesses and medical visits

[edit]
  • UI = uncertainty interval.
  • Row numbers are static. Other columns are sortable. This allows ranking of any column.

* 2019 to 2020 season is a preliminary estimate.

Estimated Influenza Disease Burden – United States[1]
Season Symptomatic Illnesses Medical Visits
Estimate 95% UI Estimate 95% UI
2010-2011 21,000,000 (20,000,000 – 25,000,000) 10,000,000 (9,300,000 – 12,000,000)
2011-2012 9,300,000 (8,700,000 – 12,000,000) 4,300,000 (4,000,000 – 5,600,000)
2012-2013 34,000,000 (32,000,000 – 38,000,000) 16,000,000 (15,000,000 – 18,000,000)
2013-2014 30,000,000 (28,000,000 – 33,000,000) 13,000,000 (12,000,000 – 15,000,000)
2014-2015 30,000,000 (29,000,000 – 33,000,000) 14,000,000 (13,000,000 – 16,000,000)
2015-2016 24,000,000 (20,000,000 – 33,000,000) 11,000,000 (9,000,000 – 15,000,000)
2016-2017 29,000,000 (25,000,000 – 45,000,000) 14,000,000 (11,000,000 – 23,000,000)
2017-2018 41,000,000 (35,500,000 – 53,000,000) 21,000,000 (18,000,000 – 27,000,000)
2018-2019 29,000,000 (25,000,000 – 40,000,000) 17,000,000 (11,500,000 – 18,500,000)
2019-2020* 35,000,000 (30,000,000 – 49,000,000) 16,000,000 (14,000,000 – 22,000,000)

See also

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References

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  1. ^ a b c d "Disease Burden of Flu". Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD). 4 October 2022. Scroll down for table and illustration.
  2. ^ "Influenza (flu)". Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD). 30 June 2023.
  3. ^ "How CDC Estimates the Burden of Seasonal Influenza in the U.S." Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD). 19 May 2023.
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