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2018-19 USA Influenza & Pneumonia Mortality Surveillance Data from the National Center for Health Statistics Mortality Surveillance System

Ronan Kelly

Ronan Kelly

Retired 2020
National Center for Health Statistics Mortality Surveillance System
The National Center for Health Statistics (NCHS) collects and disseminates the Nation's official vital
statistics. NCHS collects death certificate data from state vital statistics offices for virtually all deaths
occurring in the United States. Pneumonia and influenza (P&I) deaths are identified based on ICD-10
multiple cause of death codes.

About the Data
NCHS Mortality Surveillance System data are presented by the week the death occurred at the
national, state, and HHS Region levels. Data on the percentage of deaths due to P&I on a national level
are released two weeks after the week of death to allow for collection of enough data to produce a
stable percentage. States and HHS regions with less than 20% of the expected total deaths (average
number of total deaths reported by week during 2008-2012) will be marked as insufficient data.
Collection of complete data is not expected at the time of initial report, and a reliable percentage of
deaths due to P&I is not anticipated at the U.S. Department of Health and Human Services region or
state level within this two week period. The data for earlier weeks are continually revised and the
proportion of deaths due to P&I may increase or decrease as new and updated death certificate data
are received by NCHS.
...
https://gis.cdc.gov/grasp/fluview/FluViewPhase7QuickReferenceGuide.pdf

Influenza deaths
Week 40: 9

Pneumonia deaths
Week 40: 1,976

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 9
2017-18: 16
2016-17: 18
2015-16: 14
2014-15: 6
2013-14: 3
2012-13: 5
 
Influenza deaths
Week 40: 10
Week 41: 4
Total: 14

Pneumonia deaths
Week 40: 2,245
Week 41: 1,542
Total: 3,787

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 41 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 14
2017-18: 34
2016-17: 29
2015-16: 21
2014-15: 14
2013-14: 15
2012-13: 11
 
Influenza deaths
Week 40: 10
Week 41: 8
Week 42: 11
Total: 29

Pneumonia deaths
Week 40: 2,532
Week 41: 2,268
Week 42: 1,806
Total: 6,606

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 42 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 29
2017-18: 62
2016-17: 36
2015-16: 37
2014-15: 27
2013-14: 26
2012-13: 18
 
Influenza deaths
Week 40: 10
Week 41: 10
Week 42: 14
Week 43: 11
Total: 45

Pneumonia deaths
Week 40: 2,616
Week 41: 2,422
Week 42: 2,209
Week 43: 1,816
Total: 9,063

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 43 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 45
2017-18: 85
2016-17: 53
2015-16: 54
2014-15: 38
2013-14: 37
2012-13: 24
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 15
Week 43: 14
Week 44: 13
Total: 64

Pneumonia deaths
Week 40: 2,665
Week 41: 2,498
Week 42: 2,399
Week 43: 2,260
Week 44: 1,633
Total: 11,455

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 44 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 64
2017-18: 121
2016-17: 69
2015-16: 74
2014-15: 55
2013-14: 49
2012-13: 27
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 19
Week 44: 22
Week 45: 19
Week 46: 17
Total: 116

Pneumonia deaths
Week 40: 2,794
Week 41: 2,626
Week 42: 2,590
Week 43: 2,631
Week 44: 2,474
Week 45: 2,266
Week 46: 1,981
Total: 17,362

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 46 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 116
2017-18: 216
2016-17: 95
2015-16: 101
2014-15: 84
2013-14: 81
2012-13: 56
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 20
Week 44: 22
Week 45: 21
Week 46: 23
Week 47: 23
Total: 148

Pneumonia deaths
Week 40: 2,830
Week 41: 2,683
Week 42: 2,691
Week 43: 2,733
Week 44: 2,599
Week 45: 2,464
Week 46: 2,441
Week 47: 1,979
Total: 20,420

https://gis.cdc.gov/grasp/fluview/mortality.html


Comparison of influenza death certificates Weeks 40 - 47 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 148
2017-18: 264
2016-17: 117
2015-16: 115
2014-15: 115
2013-14: 109
2012-13: 75
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 20
Week 44: 22
Week 45: 22
Week 46: 23
Week 47: 28
Week 48: 27
Total: 181

Pneumonia deaths
Week 40: 2,846
Week 41: 2,702
Week 42: 2,714
Week 43: 2,780
Week 44: 2,647
Week 45: 2,580
Week 46: 2,648
Week 47: 2,445
Week 48: 2,182
Total: 23,559

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 48 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 181
2017-18: 347
2016-17: 151
2015-16: 137
2014-15: 161
2013-14: 142
2012-13: 106
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 21
Week 44: 23
Week 45: 22
Week 46: 23
Week 47: 31
Week 48: 32
Week 49: 38
Total: 229

Pneumonia deaths
Week 40: 2,857
Week 41: 2,743
Week 42: 2,765
Week 43: 2,829
Week 44: 2,701
Week 45: 2,647
Week 46: 2,737
Week 47: 2,611
Week 48: 2,532
Week 49: 2,083
Total: 26,505

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 49 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 229
2017-18: 465
2016-17: 184
2015-16: 157
2014-15: 244
2013-14: 184
2012-13: 170
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 21
Week 44: 23
Week 45: 24
Week 46: 24
Week 47: 31
Week 48: 32
Week 49: 42
Week 50: 34
Total: 270

Pneumonia deaths
Week 40: 2,862
Week 41: 2,748
Week 42: 2,776
Week 43: 2,864
Week 44: 2,745
Week 45: 2,702
Week 46: 2,801
Week 47: 2,704
Week 48: 2,700
Week 49: 2,496
Week 50: 1,949
Total: 29,347

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 50 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 270
2017-18: 630
2016-17: 230
2015-16: 183
2014-15: 413
2013-14: 252
2012-13: 266
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 17
Week 43: 21
Week 44: 23
Week 45: 25
Week 46: 24
Week 47: 31
Week 48: 33
Week 49: 43
Week 50: 39
Week 51: 39
Total: 317

Pneumonia deaths
Week 40: 2,866
Week 41: 2,753
Week 42: 2,782
Week 43: 2,871
Week 44: 2,753
Week 45: 2,724
Week 46: 2,829
Week 47: 2,737
Week 48: 2,775
Week 49: 2,670
Week 50: 2,435
Week 51: 1,537
Total: 31,732

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 51 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 317
2017-18: 989
2016-17: 322
2015-16: 198
2014-15: 725
2013-14: 359
2012-13: 410
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 22
Week 44: 23
Week 45: 27
Week 46: 24
Week 47: 31
Week 48: 34
Week 49: 47
Week 50: 45
Week 51: 71
Week 52: 73
Total: 437

Pneumonia deaths
Week 40: 2,873
Week 41: 2,758
Week 42: 2,792
Week 43: 2,893
Week 44: 2,802
Week 45: 2,786
Week 46: 2,903
Week 47: 2,826
Week 48: 2,865
Week 49: 2,806
Week 50: 2,825
Week 51: 2,442
Week 52: 1,986
Total: 35,557

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 52 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 437
2017-18: 1,659
2016-17: 479
2015-16: 229
2014-15: 1,237
2013-14: 566
2012-13: 642
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 22
Week 44: 23
Week 45: 28
Week 46: 25
Week 47: 31
Week 48: 34
Week 49: 48
Week 50: 45
Week 51: 76
Week 52: 89
Week 1: 111
Total: 572

Pneumonia deaths
Week 40: 2,880
Week 41: 2,765
Week 42: 2,802
Week 43: 2,895
Week 44: 2,819
Week 45: 2,819
Week 46: 2,953
Week 47: 2,905
Week 48: 2,923
Week 49: 2,857
Week 50: 2,935
Week 51: 2,442
Week 52: 2,659
Week 1: 2,253
Total: 38,907

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 1 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 572
2017-18: 2,820
2016-17: 768
2015-16: 261
2014-15: 2,247
2013-14: 917
2012-13: 1,049
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 22
Week 44: 23
Week 45: 28
Week 46: 26
Week 47: 31
Week 48: 34
Week 49: 49
Week 50: 46
Week 51: 80
Week 52: 95
Week 1: 144
Week 2: 118
Total: 736

Pneumonia deaths
Week 40: 2,883
Week 41: 2,767
Week 42: 2,806
Week 43: 2,902
Week 44: 2,821
Week 45: 2,828
Week 46: 2,959
Week 47: 2,940
Week 48: 2,985
Week 49: 2,967
Week 50: 3,025
Week 51: 2,831
Week 52: 2,713
Week 1: 2,692
Week 2: 2,055
Total: 42,174

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 2 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 736
2017-18: 4,354
2016-17: 1,136
2015-16: 291
2014-15: 3,335
2013-14: 1,378
2012-13: 1,698
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 24
Week 44: 24
Week 45: 29
Week 46: 25
Week 47: 31
Week 48: 35
Week 49: 54
Week 50: 47
Week 51: 83
Week 52: 109
Week 1: 164
Week 2: 189
Week 3: 143
Total: 997

Pneumonia deaths
Week 40: 2,921
Week 41: 2,812
Week 42: 2,934
Week 43: 3,024
Week 44: 2,942
Week 45: 2,925
Week 46: 3,046
Week 47: 3,065
Week 48: 3,133
Week 49: 3,161
Week 50: 3,237
Week 51: 3,075
Week 52: 3,058
Week 1: 3,119
Week 2: 2,904
Week 3: 2,439
Total: 47,795

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 3 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 997
2017-18: 5,979
2016-17: 1,511
2015-16: 327
2014-15: 4,317
2013-14: 1,852
2012-13: 2,331

Influenza Mortality.png
 
Last edited:
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 24
Week 44: 24
Week 45: 29
Week 46: 25
Week 47: 31
Week 48: 35
Week 49: 54
Week 50: 48
Week 51: 83
Week 52: 112
Week 1: 172
Week 2: 212
Week 3: 177
Week 4: 158
Total: 1,224

Pneumonia deaths
Week 40: 2,933
Week 41: 2,817
Week 42: 2,953
Week 43: 3,032
Week 44: 2,949
Week 45: 2,931
Week 46: 3,058
Week 47: 3,080
Week 48: 3,159
Week 49: 3,210
Week 50: 3,321
Week 51: 3,154
Week 52: 3,154
Week 1: 3,254
Week 2: 3,153
Week 3: 3,007
Week 4: 2,298
Total: 51,463

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 4 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 1,224
2017-18: 7,426
2016-17: 1,878
2015-16: 377
2014-15: 5,028
2013-14: 2,294
2012-13: 2,833

Influenza Mortality.png
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 24
Week 44: 24
Week 45: 29
Week 46: 25
Week 47: 31
Week 48: 35
Week 49: 54
Week 50: 48
Week 51: 84
Week 52: 122
Week 1: 177
Week 2: 217
Week 3: 194
Week 4: 191
Week 5: 182
Total: 1,477

Pneumonia deaths
Week 40: 2,941
Week 41: 2,844
Week 42: 2,953
Week 43: 3,034
Week 44: 2,953
Week 45: 2,934
Week 46: 3,062
Week 47: 3,089
Week 48: 3,177
Week 49: 3,226
Week 50: 3,353
Week 51: 3,239
Week 52: 3,302
Week 1: 3,339
Week 2: 3,255
Week 3: 3,228
Week 4: 2,794
Week 5: 2,367
Total: 55,090

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 5 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 1,477
2017-18: 8,782
2016-17: 2,229
2015-16: 438
2014-15: 5,611
2013-14: 2,679
2012-13: 3,225

Influenza Mortality.png
 
2018-2019 U.S. Flu Season: Preliminary Burden Estimates



Language: English (US)
Untitled.png

*These estimates are preliminary and based on data from CDC’s weekly influenza surveillance reports summarizing key influenza activity indicators.
On This Page

This web page provides weekly preliminary estimates of the cumulative in-season numbers of flu illnesses, medical visits and hospitalizations in the United States. CDC has estimated the burden of flu since 2010 using a mathematical model that is based on observed rates of laboratory-confirmed influenza-associated hospitalizations collected through a surveillance network that covers approximately 8.5% of the U.S. population (~27 million people). Estimates of flu-related deaths will be provided at a later time, when there is sufficient data to support a more precise estimate for that outcome.
The 2018-2019 flu season is the first season CDC has reported in-season burden estimates of flu in the U.S. These in-season estimates will be updated over the course of the flu season.


Limitations

The estimates of the cumulative burden of seasonal influenza are subject to several limitations.
First, the cumulative rate of laboratory-confirmed influenza-associated hospitalizations reported during the season may be an under-estimate of the rate at the end of the season because of identification and reporting delays.
Second, rates of laboratory-confirmed influenza-associated hospitalizations were adjusted for the frequency of influenza testing and the sensitivity of influenza diagnostic assays. However, data on testing practices during the 2018-2019 season are not available in real-time. CDC used data on testing practices from the 2014-2015 influenza season as a proxy. Burden estimates will be updated at a later date when data on contemporary testing practices become available.
Third, estimates of influenza-associated illness and medical visits are based on data from prior seasons, which may not be accurate if the seriousness of illness or patterns of care-seeking have changed.
Frequently Asked Questions

What does the cumulative burden of influenza for the 2018-2019 season mean?

The cumulative burden of influenza is an estimate of the number of people who have been sick, seen a healthcare provider, been hospitalized, or died as a result of influenza since October 01, 2018. CDC does not know the exact number of people who have been sick and affected by influenza because influenza is not a reportable disease in most areas of the United States. However, these numbers are estimated using a mathematical model, based on observed rates of laboratory-confirmed influenza-associated hospitalizations.
How does CDC estimate the cumulative burden of seasonal influenza?

Preliminary estimates of the cumulative burden of seasonal influenza during the 2018-2019 season in the United States are based on crude rates of laboratory-confirmed influenza-associated hospitalizations, reported through the Influenza Hospitalization Surveillance Network (FluSurv-NET), which were adjusted for the frequency of influenza testing during recent prior seasons and the sensitivity of influenza diagnostic assays. Rates of hospitalization were then multiplied by previously estimated ratio of hospitalizations to symptomatic illnesses, and frequency of seeking medical care to calculate symptomatic illnesses, medical visits, and deaths associated with seasonal influenza, respectively.
Why does the estimate of cumulative burden change each week?

The estimates of cumulative burden of seasonal influenza are considered preliminary and may change each week as new laboratory-confirmed influenza-associated hospitalizations are reported to CDC. New reports include both new admissions that have occurred during the reporting week and also patients admitted in previous weeks that have been newly reported to CDC.
How does the number of flu hospitalizations estimated so far this season compare with previous end-of-season hospitalization estimates?

The number of hospitalizations estimated so far this season is lower than end-of-season total hospitalization estimates for any season since CDC began making these estimates. This table also summarizes all estimated influenza disease burden, by season, in U.S. from 2010-11 through 2017-18.

Preliminary Cumulative Estimates of Hospitalizations in the U.S. 2018-2019 Flu Season

prelim-hosp-burden-graph-1152px.jpg

*These estimates are preliminary and based on data from CDC’s weekly influenza surveillance reports summarizing key influenza activity indicators.
508 text for this chart:
Estimated number of influenza-associated hospitalizations
The y-axis extends from 0 to 1 million.
The x-axis is a timeline starting November 24 and extending to April 27.
There is a single blue-shaded curve labeled with “2018/19”.
There are several other lines on the right side of the graph under Total hospitalizations at end of past seasons. The lines are labeled, from top to bottom, as 2017/18, 2014/15, 2016/17, 2012/13, 2013/14, 2015/16, 2010/11, and 2011/12.




[/COLOR]

https://www.cdc.gov/flu/about/burden/preliminary-in-season-estimates.htm
 
Influenza deaths
Week 40: 10
Week 41: 12
Week 42: 18
Week 43: 24
Week 44: 24
Week 45: 29
Week 46: 25
Week 47: 31
Week 48: 35
Week 49: 54
Week 50: 48
Week 51: 85
Week 52: 123
Week 1: 180
Week 2: 222
Week 3: 205
Week 4: 218
Week 5: 236
Week 6: 205
Total: 1,784

Pneumonia deaths
Week 40: 2,944
Week 41: 2,844
Week 42: 2,956
Week 43: 3,037
Week 44: 2,958
Week 45: 2,943
Week 46: 3,067
Week 47: 3,092
Week 48: 3,184
Week 49: 3,238
Week 50: 3,371
Week 51: 3,286
Week 52: 3,360
Week 1: 3,417
Week 2: 3,433
Week 3: 3,485
Week 4: 3,112
Week 5: 2,964
Week 6: 2,263
Total: 58,954

https://gis.cdc.gov/grasp/fluview/mortality.html

Comparison of influenza death certificates Weeks 40 - 6 with corresponding period from previous years (note figures for 2018-19 are preliminary and are likely to increase)
2018-19: 1,784
2017-18: 10,022
2016-17: 2,648
2015-16: 531
2014-15: 6,095
2013-14: 2,994
2012-13: 3,492

Influenza Mortality.png
 
2018-2019 U.S. Flu Season: Preliminary Burden Estimates

flu estimates.png *These estimates are preliminary and based on data from CDC?s weekly influenza surveillance reports summarizing key influenza activity indicators.
[h=4]On This Page[/h]


This web page provides weekly preliminary estimates of the cumulative in-season numbers of flu illnesses, medical visits, hospitalizations, and deaths in the United States. CDC has estimated the burden of flu since 2010 using a mathematical model that is based on observed rates of laboratory-confirmed influenza-associated hospitalizations collected through a surveillance network that covers approximately 8.5% of the U.S. population (~27 million people).
The 2018-2019 flu season is the first season CDC has reported in-season burden estimates of flu in the U.S. These in-season estimates will be updated over the course of the flu season.


[h=3]Limitations[/h] The estimates of the cumulative burden of seasonal influenza are subject to several limitations.
First, the cumulative rate of laboratory-confirmed influenza-associated hospitalizations reported during the season may be an under-estimate of the rate at the end of the season because of identification and reporting delays.
Second, rates of laboratory-confirmed influenza-associated hospitalizations were adjusted for the frequency of influenza testing and the sensitivity of influenza diagnostic assays. However, data on testing practices during the 2018-2019 season are not available in real-time. CDC used data on testing practices from the 2014-2015 influenza season as a proxy. Burden estimates will be updated at a later date when data on contemporary testing practices become available.
Third, estimates of influenza-associated illness and medical visits are based on data from prior seasons, which may not be accurate if the seriousness of illness or patterns of care-seeking have changed.
[h=3]Frequently Asked Questions[/h] [h=4]What does the cumulative burden of influenza for the 2018-2019 season mean?[/h] The cumulative burden of influenza is an estimate of the number of people who have been sick, seen a healthcare provider, been hospitalized, or died as a result of influenza since October 01, 2018. CDC does not know the exact number of people who have been sick and affected by influenza because influenza is not a reportable disease in most areas of the United States. However, these numbers are estimated using a mathematical model, based on observed rates of laboratory-confirmed influenza-associated hospitalizations.
[h=4]How does CDC estimate the cumulative burden of seasonal influenza?[/h] Preliminary estimates of the cumulative burden of seasonal influenza during the 2018-2019 season in the United States are based on crude rates of laboratory-confirmed influenza-associated hospitalizations, reported through the Influenza Hospitalization Surveillance Network (FluSurv-NET), which were adjusted for the frequency of influenza testing during recent prior seasons and the sensitivity of influenza diagnostic assays. Rates of hospitalization were then multiplied by previously estimated ratio of hospitalizations to symptomatic illnesses, and frequency of seeking medical care to calculate symptomatic illnesses, medical visits, and deaths associated with seasonal influenza, respectively.
[h=4]Why does the estimate of cumulative burden change each week?[/h] The estimates of cumulative burden of seasonal influenza are considered preliminary and may change each week as new laboratory-confirmed influenza-associated hospitalizations are reported to CDC. New reports include both new admissions that have occurred during the reporting week and also patients admitted in previous weeks that have been newly reported to CDC.
[h=4]How does the number of flu hospitalizations estimated so far this season compare with previous end-of-season hospitalization estimates?[/h] The number of hospitalizations estimated so far this season is lower than end-of-season total hospitalization estimates for any season since CDC began making these estimates. This table also summarizes all estimated influenza disease burden, by season, in U.S. from 2010-11 through 2017-18.

[h=4]Preliminary Cumulative Estimates of Hospitalizations in the U.S. 2018-2019 Flu Season[/h]
prelim-hosp-burden-graph-1152px.jpg

*These estimates are preliminary and based on data from CDC?s weekly influenza surveillance reports summarizing key influenza activity indicators.
508 text for this chart:
Estimated number of influenza-associated hospitalizations
The y-axis extends from 0 to 1 million.
The x-axis is a timeline starting November 24 and extending to April 27.
There is a single blue-shaded curve labeled with ?2018/19?.
There are several other lines on the right side of the graph under Total hospitalizations at end of past seasons. The lines are labeled, from top to bottom, as 2017/18, 2014/15, 2016/17, 2012/13, 2013/14, 2015/16, 2010/11, and 2011/12.
https://www.cdc.gov/flu/about/burden/preliminary-in-season-estimates.htm

 
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