Weekly Influenza & Respiratory Illness Activity Report

Weekly Influenza & Respiratory

Illness Activity Report

A summary of influenza surveillance indicators prepared by the Division of Infectious Disease Epidemiology Prevention & Control

Summary of the 2019-20 Influenza Season

Summary of the 2019-20 Influenza Season:

? 4,022 people were hospitalized with laboratory-confirmed influenza

? 3 pediatric influenza-associated deaths were reported

? 197 influenza-associated deaths were reported

? 109 outbreaks of influenza in long-term care facilities were reported

? 921 outbreaks of influenza-like illness in K-12 schools were reported

Weekly Influenza & Respiratory Activity: Statistics ()

Weekly U.S. Influenza Surveillance Report ()

World Health Organization (WHO): Influenza Updates ()

Neighboring states¡¯ influenza information:

? Iowa Flu Reports ()

? Wisconsin: Influenza (Flu) ()

? North Dakota: Influenza ()

? South Dakota Influenza Information ()

Minnesota Department of Health

651-201-5414 or 1-877-676-5414

health.state.mn.us

10/13/2020

Hospitalized Influenza Surveillance

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

serological tests or RT-PCR) and specimens from hospitalized patients with acute respiratory illness submitted to MDH-PHL by hospitals and

laboratories. Due to the need to confirm reports and reporting delays, consider current week data preliminary.

Hospitalized Influenza Cases by Type

Minnesota (FluSurv-NET*)

700

Number of Hospitalizations

650

600

B (no genotype)

B (Yamagata)

B (Victoria)

A (not subtyped)

550

A H3

500

A H1 (unspecified)

450

A (H1N1)pdm09

400

350

300

250

Number of Hospitalizations

750

Hospitalized Influenza Cases by Season, Minnesota

(FluSurv-NET*)

A (H1N2v)

A (H3N2v)

A&B

Unknown

200

150

100

750

700

650

600

550

500

450

400

350

300

250

200

150

100

50

0

2014-15

2015-16

2016-17

2017-18

2018-19

2019-20

40 42 44 46 48 50 52 2

6

8 10 12 14 16 18 20

MMWR Week

50

0

4

40 42 44 46 48 50 52 2

4

6

8 10 12 14 16 18 20

MMWR Week

Total hospitalizations

4,022

*Influenza Surveillance Network

Season

2014-2015

2015-2016

2016-2017

2017-2018

2018-2019

2019-2020

Total hospitalizations

(historic)

4,081

1,538

3,695

6,446

2,543

4,022

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report: Summary of the 2019-20 Influenza Season

2

Hospitalized Influenza Surveillance (continued)

Incidence (cases) per

100,000 Persons

76.8

65.7

75.4

58.4

79.3

62.4

62.8

46.8

Central

Metro

Northeast

Northwest

South Central

Southeast

Southwest

West Central

3000

2750

2500

2250

2000

1750

1500

1250

1000

750

500

250

0

# of hospitalizations

Incidence (cases) per

100,000 Persons

196.2

100.2

82.3

22.4

0-4

5-24

37.8

25-49

50-64

65+

300.0

275.0

250.0

225.0

200.0

175.0

150.0

125.0

100.0

75.0

50.0

25.0

0.0

Age Group (years)

Region

Region

300.0

275.0

250.0

225.0

200.0

175.0

150.0

125.0

100.0

75.0

50.0

25.0

0.0

Number of Hospitalizations

# of hospitalizations

Number of Influenza Hospitalizations and Incidence by

Age, Minnesota

September 29, 2019 ¨C May 16, 2020

Hospitalizations per 100,000 Persons

3000

2750

2500

2250

2000

1750

1500

1250

1000

750

500

250

0

Hospitalizations per 100,000 Persons

Number of Hospitalizations

Number of Influenza Hospitalizations and Incidence by

Region, Minnesota

September 29, 2019 ¨C May 16, 2020

Total

503 (13%)

2,381 (59%)

245 (6%)

93 (2%)

232 (6%)

318 (8%)

136 (3%)

114 (3%)

Median age (years)

at time of admission

61.0

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report: Summary of the 2019-20 Influenza Season

3

Influenza-Associated Death Surveillance

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

influenza listed 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 reported to influenza surveillance. Due to the need to confirm reports and reporting delays, consider

current week data preliminary.

Deaths Associated with Influenza by Season, Minnesota

300

2014-15

60

2015-16

50

2017-18

2018-19

40

2019-20

30

20

2015-16

2016-17

2017-18

2018-19

2019-20

200

150

100

50

10

0

2014-15

250

2016-17

Number of Deaths

Number of Deaths

70

Deaths Associated with Influenza by Age Group and

Season, Minnesota

40 42 44 46 48 50 52 2

4

6

8 10 12 14 16 18 20

0

MMWR Week of Death

Season

2014-2015

2015-2016

2016-2017

2017-2018

2018-2019

2019-2020

Total deaths

(historic)

368

76

273

440

95

197

*Influenza Surveillance Network

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

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