Weekly Influenza Respiratory Illness Activity Report

Weekly Influenza & Respiratory Illness Activity Report

Week Ending Feb. 18, 2023 | WEEK 7

A summary of influenza surveillance indicators prepared by the Division of Infectious Disease Epidemiology Prevention & Control. All data are preliminary and may change as more information is received.

Minnesota Influenza Key Statistics

Percent of molecular laboratory tests positive

1.3%

Hospitalizations

3,239

Most common strain

Influenza A/H3

School outbreaks

998

Long-term care outbreaks

99

Pediatric influenza-associated deaths

0

Contents

Hospitalized Influenza Surveillance.............................................................................................................2 Influenza-Associated Death Surveillance....................................................................................................4 Respiratory Disease Outbreak Surveillance: School Outbreaks..................................................................5 Respiratory Disease Outbreak Surveillance: LTC Outbreaks.......................................................................6 Sentinel Provider Surveillance (Outpatients)..............................................................................................7 Laboratory Surveillance ..............................................................................................................................8 Weekly U.S. Influenza Surveillance Report................................................................................................12

Minnesota Influenza Surveillance (health.state.mn.us/diseases/flu/stats/) Weekly U.S. Influenza Surveillance Report (flu/weekly/) World Health Organization (WHO) Surveillance (who.int/influenza/surveillance_monitoring/updates/en/) Neighboring states' influenza information:

Iowa: Iowa Flu Reports (idph.influenza/reports) Wisconsin: Influenza (Flu) (municable/influenza/) North Dakota: Reported Seasonal Influenza Activity in North Dakota (default.aspx) South Dakota: South Dakota Influenza Information (doh.diseases/infectious/flu/)

Due to the COVID-19 pandemic, CDC and MDH will not be posting the weekly geographic spread indicators (no activity, sporadic, local, regional, widespread) this season as they rely on influenza-like illness data (ILI). Because these data are based on symptoms, the cause of ILI cannot reliably be attributed to influenza while COVID-19 is widely circulating.

Minnesota Department of Health 651-201-5414 or 1-877-676-5414 health.state.mn.us

Week

B (no genotype)

B (Yamagata)

B (Victoria)

A (not subtyped)

A H3

A H1 (unspecified)

A (H1N1)pdm09

A (H1N2v)

A (H3N2v)

A&B

Unknown

Week

2017-2018

2018-2019

2019-202020

2021-2022

2022-2023

40

Type

1

Hospitalized Influenza Surveillance 4

1

1

40

3.0

2.0

0.0

2.0

6.0

5

3

2

41

4.0

5.0

1.0

0.0

11.0

Type

1

7

5

1

42

11.0

6.0

1.0

3.0

14.0

43

8.0

8.0

1.0

3.0

45.0

43

1

35

8

1

Hospitalized influenza cases are based on disease reports of laboratory-positive influenza (via DFA, IFA, viral culture, EIA, rapid test, paired serological tests

44

5.0

7.0

1.0

0.0

121.0

or44 RT-P1CR) and specimens10f4rom h15ospitalized patients with a1 cute respiratory illness submitted to MDH-PHL by hospitals and laboratories. Due to the need to

4c5 onfirm1 reports and report233ing de41lays, co4 nsider current week data preliminary. 45 7.0

12.0

2.0

2.0

279.0

45

1

232

84

6

46

2.0

22.0

3.0

2.0

323.0

Sum of Frequency Number of hospitalizaons

47

3

48

2

49

4

700

50

2

51

600

52

2

1

5001

2

1

400

3

1

4

3002

5

6

2001

1 Hospital39i2 zed I1n63 fluen7 za Cases by Type, Mi42n2 neso141ta (Fl9 uSurv-NET*)

1

297

87

12

1

207

67

13

136

17

1

138

25

3

64

7

3

38

5

25

1

3

16

1

12

4

6

2

1

47

7.0

48

10.0

49

13.0

50

8.0

600

51

18.0

52

50.0

1

50052.0

2

55.0

3

40051.0

4

99.0

5

300138.0

6

130.0

7

200155.0

H25.o0 spitalize5.0d Influen1.0za Cases by566.0 Season,

51.0

Min1.0nesota (F12l.0uSurv-NE574.T0 *)

46.0

1.0

28.0

402.0

66.0

0.0

51.0

289.0

110.0

0.0

105.0

154.0

194.0

2.0

129.0

168.0

247.0

2.0

98.0

75.0

184.0

1.0

53.0

44.0

203.0

4.0

35.0

30.0

237.0

0.0

23.0

19.0

228.0

5.0

21.0

16.0

361.0

1.0

13.0

10.0

372.0

1.0

19.0

11.0

7

2

100

8

7

1

1

8

228.0

446.0

0.0

8.0

9

100193.0

422.0

1.0

22.0

9

0

40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

10

MMWR Week

11 B (no genotype) B (Yamagata)

12 B (Victoria)

A (not subtyped) A H3 A (H1N1) pdm09

A (H1N2v) A (H3N2v) A & B

Unknown

13

10

257.0

368.0

1.0

20.0

11

0236.0

244.0

0.0

26.0

40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20

12

189.0

104.0

0.0

30.0

MMWR Week

13

1826.0022-2023

34.0 2021-2022

0.0 2020-2021 21.0 2019-2020

2018-2019

2017-2018

14

136.0

8.0

1.0

14.0

Hospitalizations this week Hospitalizations last week Total hospitalizations (to date)

Season 15

93.0

4.0

T0o.0 tal hospitali2z5.0ations (historic)

14

11

11

15

16

17

18

19

*FluSurv-NET = Influenza Surveillance Network

20

3,239

16 2017-512.0 018

3.0

17 2018-552.0 019

2.0

18 2019-282.0 020

0.0

19 2020-282.0 021

1.0

20 2021-162.0 022

0.0

2022-2023 (to date)

60,.0446

36.0

20,.0543

35.0

40,.0022

34.0

350.0

21.0

901 0.0

7.0

3,239 (to date)

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report for Week Ending Feb. 18, 2023 | WEEK 7

Page 2

Number of hospitalizaons Hospitalizaons per 100,000 persons

Number of hospitalizaons Incidence rate

Hospitalized Influenza Surveillance (continued)

Number of Influenza Hospitalizations and Incidence by Region, Minnesota

Number of Influenza Hospitalizations and Incidence by Age, Minnesota

2000 1800

1600

Region

1400# of hospitalizations

Incidence (cases) per 100,000 Persons

Central

1204046.0

57.2

Metro

1,946.0

62.2

1000

Northeast

200.0

61.8

Northwest

80802.0

51.4

South Central

600112.0 57.2 38.3

Southeast

239.0

46.6

400

Southwest

75.0

35.0

West Central

200139.0

56.9

Total

0327

5.80

Central

62.2 Metro

Number of hospitalizaons

200 180

160

140

120

100

80

61.8

51.4

46.6

56.9 60

40

38.3

35.0

20

Northeast

Northwest South Central Southeast

0 Southwest West Central

Region Incidence (cases) per 100,000 persons

2000 1800

1600

Age

# of hospitalizations Incidence (cases) per

100,000 Persons

1400

0-4

292.0

84.4

5-24

1203083.0

26.4

25-49

430.0

1000

50-64

524.0

800

65+

1,610.0

Case Total

603027

23.6

844.84.0

169.7 5.78

400

200

0 0-4

Number of hospitalizaons

48.0

26.4

23.6

5-24

25-49

50-64

Age group (years)

Incidence (cases) per 100,000 persons

200

169.7

180

160

140

120

100

80

60

40

20

0 65+

Region Central

Hospitalizations Total

this week

(to date)

2

446

% Hospitalizations this week

18%

% Total (to date)

14%

Median age (years) at time of admission 64

Metro

7

1946

64%

60%

Northeast

0

200

0%

6%

Northwest

0

82

0%

3%

South Central 2

112

18%

3%

Southeast

0

239

0%

7%

Southwest

0

75

0%

2%

West Central 0

139

0%

4%

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report for Week Ending Feb. 18, 2023 | WEEK 7

Page 3

Week

2022-2023

2021-2022

2020-2021

2019-2020

2018-2019

2017-2018

1.00

1

0.00

0

1.00

Influenza-Associated 0.00

0.00

1.00

0.00

Death

Surveillance

0.00

0.00

0.00

0.00

0.00

0.00

0

0.00

0.00

0.00

0.00

0.00

1.00

0

1.00

0.00

1.00

0.00

1.00

Influenza deaths are collected via reports from Minnesota's death certificate database, hospitals, and long-term care facilities. Decedents with influenza listed

0.00

3

0.00

0.00

0.00

0.00

1.00

as a cause of or contributor to death, have recent laboratory confirmation of influenza, or are part of an ongoing influenza outbreak at a long-term care facility

are 0.00 reporte3d to influen0.0z0 a surveilla1.0n0 ce. Due to0.00 the need0.0t0 o confirm2.0r0eports and reporting delays, consider current week data preliminary.

0.00

6

0.00

0.00

1.00

0.00

1.00

1.00

0.00

2.00

50

2.00

2.00

45

12

Deaths

Associated 1.00

0.00

with

Infl0.0u0 enza

by0.0S0 eason,

1.00

11

0.00

Minnesota 0.00

1.00

1.00

3.00

18

2.00

0.00

1.00

1.00

8.00

26

2.00

0.00

4.00

0.00

7.00

11

2.00

0.00

3.00

3.00

23.00

6.00

40

9

6.00

8

35

3.00

7

9.00

30

4

6.00

0.00

3.00

3.00

25.00

6.00

3.00

10.00

2.00

48.00

3.00

1.00

11.00

1.00

49.00

9.00

0.00

4.00

3.00

50.00

Number of deaths

1.00

25

4

5.00

2

20

3.00

2

15

3.00

0

0.00

10

1.00

1.00

8.00

3.00

42.00

5.00

1.00

8.00

4.00

35.00

3.00

0.00

9.00

6.00

27.00

3.00

0.00

12.00

8.00

17.00

0.00

0.00

15.00

8.00

33.00

0.00

5

0.00

0.00

23.00

3.00

16.00

0.00

0.00

0.00

20.00

18.00

5.00

0

1.00

40 41 42 43 44 45 46 471.00 48 49 50 51 520.00 1 2 3 4 5 6 21.00 7 8 9 10 11 15.00 12 13 14 15 1612.00 17 18 19 20

0.00

0.00

0.00 MMWR Week 15.00

14.00

6.00

1.00

2022-2023

2021-210.020 2

2020-20.000 21

2019-132.00020

20185.0-02019

2015.700-2018

Deaths Associated with Influenza by Age Group and Season,

Minnesota

0-17

18-49

50-64

65-79

80+

Season 0-17

250

2017-2018 6

2018-2019 1

2019-2020 3

2020-2021 0

2021-2022 2

2022-2023 0

18-49

10

9

15

2

5

8

200

50-64

37

16

31

1

6

21

65-79

101

33

51

1

150

80+

281

36

53

3

18

42

23

80

Number of deaths

100

50 0

2017-2018

2018-2019

Top: Age group (years) Boom: Season

2019-2020

2020-2021

2021-2022

2022-2023

2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023 2017-2018 2018-2019 2019-2020 2020-2021 2021-2022 2022-2023

1.00

1.00

0.00

Season

3.00

Total deaths (historic)

3.00

0.00

2017-2018

440

1.00

1.00

0.00

2018-2019

126

1.00

1.00

0.00

2019-2020

197

0.00

0.00

0.00

2020-2021

7

19

1.00

0.00

2021-2022

54

20

0.00

0.00

2022-2023 (to date) 151

*FluSurv-NET = Influenza Surveillance Network

4.00

8.00

12.00

Total pediatric ( ................
................

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