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 2018-19 Influenza Season

Summary of the 2018-19 Influenza Season: ? 2,522 people were hospitalized with laboratory-confirmed influenza ? 2 pediatric influenza-related deaths were confirmed ? 126 influenza-associated deaths were reported ? 60 outbreaks of influenza in long-term care facilities were reported ? 381 outbreaks of ILI in schools were reported

Minnesota Influenza Surveillance:



Weekly U.S. Influenza Surveillance Report:

World Health Organization (WHO) Surveillance:

Neighboring states' influenza information:

Iowa



Wisconsin

North Dakota

South Dakota

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

9/17/2019

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*)

Hospitalized Influenza Cases by Season, Minnesota (FluSurv-NET*)

Number of Hospitalizations Number of Hospitalizations

500

B (no genotype)

450

B (Yamagata)

B (Victoria)

400

A (not subtyped)

A H3

350

A H1 (unspecified)

300

A (H1N1)pdm09

A (H1N2v)

250

A (H3N2v)

A&B

200

Unknown

150

100

750

700

2013-14

650

2014-15

600

2015-16

550

2016-17

500

2017-18

450

400

2018-19

350

300

250

200

150

100

50

0

40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20

50

MMWR Week

0 40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20

MMWR Week

Season

2013-2014 2014-2015

Total hospitalizations (historic) 1,578 4,081

Total hospitalizations

2015-2016 2016-2017

1,538 3,695

2,522

2017-2018 2018-2019

6,446 2,522

*Influenza Surveillance Network

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report: Summary of the 2018-19 Influenza Season

2

Hospitalized Influenza Surveillance (continued)

Number of Influenza Hospitalizations and Incidence by Region, Minnesota

September 30, 2018 ? May 18, 2019

Number of Influenza Hospitalizations and Incidence by Age, Minnesota

September 30, 2018 ? May 18, 2019

Number of Hospitalizations Number of Hospitalizations

1400 1200 1000

# of hospitalizations

Incidence (cases) per 100,000 Persons

140.0 120.0 100.0

1400 1200 1000

# of hospitalizations

Incidence (cases) per 100,000 Persons

135.5

800

63.7

58.9

80.0

600

44.6

41.2

400

34.7

46.4 42.3 41.6 60.0 40.0

200

20.0

0

0.0

Region

800

57.6

56.3

600

400 23.0

200

10.6

0 0-4

5-24 25-49 50-64

65+

Age Group (years)

Region

Total

Median age (years) at time of admission

Central

309 (12%)

62.0

Metro

1,354 (54%)

Northeast

207 (8%)

Northwest

55 (2%)

South Central

171 (7%)

Southeast

234 (9%)

Southwest

92 (4%)

West Central

100 (4%)

Minnesota Department of Health Weekly Influenza & Respiratory Activity Report: Summary of the 2018-19 Influenza Season

Hospitalizations per 100,000 Persons Hospitalizations per 100,000 Persons

140.0 120.0 100.0 80.0 60.0 40.0 20.0 0.0

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

Deaths Associated with Influenza by Age Group and Season, Minnesota

Number of Deaths Number of Deaths

70

2013-14

60

2014-15

2015-16

50

2016-17

2017-18

40

2018-19

30

300

2013-14 2014-15 2015-16 2016-17 2017-18 2018-19

250

200

150

20

100

10

50

0 40 42 44 46 48 50 52 2 4 6

MMWR Week

8 10 12 14 16 18 20

0

0-17

18-49

50-64

65-79

80+

Age Group (years)

Season

2013-2014 2014-2015

Total deaths (historic) 83 368

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

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