United States influenza statistics by flu season explained

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

• 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

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

• 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

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

• Influenza pandemic
• 2009 swine flu pandemic
• COVID-19 pandemic in the United States. Statistics section.
• COVID-19 pandemic by country and territory. Flu statistics are often compared to coronavirus statistics.
• COVID-19 pandemic cases. More statistics for comparison purposes.
• COVID-19 pandemic deaths. More statistics for comparison purposes.
• Influenza vaccine
• Bird flu
• Human flu
• Swine flu
• Horse flu
• Dog flu
• Freshers' flu
• 2012–2013 flu season
• 2017–2018 United States flu season
• 2019–2020 United States flu season

Notes and References

1. Web site: Disease Burden of Flu . . 4 October 2022 . Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD) . en-us. Scroll down for table and illustration.
2. Web site: Influenza (flu) . 30 June 2023 . Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD) . en-us.
3. Web site: How CDC Estimates the Burden of Seasonal Influenza in the U.S. . 19 May 2023 . Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases (NCIRD) . en-us.