north carolina weekly influenza surveillance …n.c. weekly influenza summary - january 4, 2020 8...

N.C. Weekly Influenza Summary - February 1, 2020 1

NORTH CAROLINA WEEKLY INFLUENZA SURVEILLANCE SUMMARY2019-2020 INFLUENZA SEASONWEEK ENDING FEBRUARY 1, 2020

ILINet has now expanded to include emergency department data that were previously reported separately.

*For more information about national data visit https://www.cdc.gov/flu/weekly/index.htm.

(Data Source: Influenza-Like Illness (ILINET))

Percent of Total Outpatient Visits with ILI, NC 2017-2020

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0%

1%

2%

3%

4%

5%

6%

7%

8%

9%

10%

11%

% IL

I

2019-20202018-20192017-2018

StatewideUpdates

Influenza-like illness (ILI) increased for week ending February 1, 2020.

The geographic spread of flu was WIDESPREAD this week.

Of the 60 specimens submitted to the State Laboratory of Public Health (SLPH) for viral testing this week 19were positive for influenza A(H1) and 14 were positive for influenza B(Victoria) virus.

Hospital-based Public Health Epidemiologists (PHEs) reported 1054 positive influenza virus results out of3907 samples tested during week ending 2/1/2020; 376 were positive for influenza B(unknown), 507 werepositive for influenza A(unknown), 169 were positive for influenza A(H1), and 2 were positive for influenzaA(H3) virus.

RegionalUpdates

The proportion of visits due to ILI in Region 4 (Southeastern US) was at 5.50% for week 4 (ending1/25/2020). The baseline for the region is 2.4%.

NationalUpdates

The proportion of outpatient visits due to ILI nationally was at 5.69% for week 4 (ending 1/25/2020). Thenational baseline for ILI is 2.4%.

InternationalUpdates

Worldwide seasonal influenza subtype A viruses accounted for a majority of detections. For more countryspecific details please visit:http://www.who.int/influenza/surveillance_monitoring/updates/latest_update_GIP_surveillance/en/

For more flu information visit https://flu.nc.gov and https://www.cdc.gov/flu.


INFLUENZA-LIKE ILLNESS NETWORK 2019-2020

Week No. - End Date No. of Sentinels Reporting No. of ILINo.

of Patients% ILI

#40 - 10/05/2019 156 1206 110,762 1.09

#41 - 10/12/2019 156 1201 107,331 1.12

#42 - 10/19/2019 161 1298 103,375 1.26

#43 - 10/26/2019 167 1438 108,925 1.32

#44 - 11/02/2019 170 1454 109,490 1.33

#45 - 11/09/2019 170 1590 104,302 1.52

#46 - 11/16/2019 169 1606 100,063 1.60

#47 - 11/23/2019 167 1796 104,199 1.72

#48 - 11/30/2019 161 1726 91,689 1.88

#49 - 12/07/2019 165 2294 104,819 2.19

#50 - 12/14/2019 162 2500 103,550 2.41

#51 - 12/21/2019 162 3362 103,496 3.25

#52 - 12/28/2019 159 4884 101,629 4.81

#1 - 01/04/2020 157 4891 105,018 4.66

#2 - 01/11/2020 161 4071 106,454 3.82

#3 - 01/18/2020 156 4452 109,042 4.08

#4 - 01/25/2020 160 4716 105,521 4.47

#5 - 02/01/2020 151 5729 108,740 5.27


PHE RESPIRATORY VIRAL PATHOGEN SURVEILLANCE

Positive test results for selected respiratory viruses are reported on a weekly basis by Public Health Epidemiologists(PHEs) located in seven of the largest hospital networks across North Carolina.

These data provide a useful indication of which other respiratory viruses are circulating and possibly contributing to ILI inthe state. The total number of tests performed is not available from all hospital networks, so the overall proportiontesting positive cannot be calculated. Testing protocols and practices differ among hospitals. These numbers reflect testresults from participating hospitals only and might not be reflective of the entire state.

*Most facilities use tests that do not distinguish rhinoviruses from enteroviruses.

(Data source: NC DETECT)

Positive Respiratory Virus Test Results by Week

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0

60

120

180

240

300

360

420

480

540

600

660

720

780

840

900

960

1020

No.

of P

osit

ives

InfluenzahMPVRhinovirus*AdenovirusParainfluenzaRSV

Data in shaded area m

ay be incomplete

• Influenza was the most frequently identified respiratory viral pathogen during week ending 02/01/2020 followed by RSV.


PHE ACUTE RESPIRATORY ADMISSIONS SURVEILLANCE

The number of patients admitted to the hospital with fever plus respiratory symptoms in the absence of a known causeother than influenza is reported on a weekly basis by Public Health Epidemiologists (PHEs) located in seven of the largesthospital networks across North Carolina.

In conjunction with other surveillance information, these data help us monitor for changes in severity of respiratoryillness during periods when influenza is circulating. Please note that these reports are not limited to patients withlaboratory-confirmed influenza infection. Also, these numbers reflect admissions to participating hospitals only and arenot reflective of the entire state.

(Data source: NC DETECT)

Hospital Admissions for Acute Respiratory Illness

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0

20

40

60

80

100

120

140

160

180

200

220

240

260

280

300

320

340

360

380

400

Co

un

t

TotalAge UnknownAge 65+Age 25 - 64Age 5 - 24Age 0 - 4

Data in shaded area m

ay be incomplete

• Acute respiratory admissions increased during week ending 02/01/2020

• The highest number of acute respiratory admissions during week ending 02/01/2020 was for patients Age 65+followed by Age 25 - 64.


NORTH CAROLINA STATE LABORATORY OF PUBLIC HEALTH

Influenza Positive Tests Reported by the NC State Laboratory of Public Health (SLPH)

† Percent of submitted specimens for any influenza.

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0

10

20

30

# Po

siti

ve S

peci

men

s

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

% P

osi

tive

†

B (not subtyped)B (Yamagata)B (Victoria)Seasonal A (H3)2009 A (H1N1)A (not subtyped)

Percent Positive †

Influenza Virus Isolate Results for 2019–2020 Season*

Virus Type # Positive from SLPH01/26/20-02/01/20

Total Positive for SLPH(09/29/19 - 05/16/20)

# Positive from PHE01/26/20-02/01/20

Total Positive for PHE(09/29/19 - 05/16/20)

A (unknown) 0 0 507 2033

2009 A(H1N1) 19 68 169 722

A(H3) 0 15 2 28

B (unknown) 0 1 376 2815

B (Victoria) 14 94 NA NA

B (Yamagata) 0 6 NA NA

Total 33 184 1054 5598

*2019-2020 influenza season began September 29, 2019.

Influenza Positive Tests Reported by PHE Facilities

† Percent of submitted specimens for any influenza.

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0

200

400

600

800

1000

# Po

siti

ve S

peci

men

s

0%

10%

20%

30%

40%

50%

60%

70%

80%

90%

100%

% P

osi

tive

†

Seasonal BSeasonal A (H3)A (H1)A (not subtyped)

Percent Positive †


FLU SURVEILLANCE BY REGIONS

*This graph begins with data starting week ending October 5, 2019 for the 2019-2020 influenza season.

(Data Source: NC DETECT, 2019-2020)

Percent of Total Emergency Department Vists with ILI

10/05 10/19 11/02 11/16 11/30 12/14 12/28 01/11 01/25 02/08 02/22 03/07 03/21 04/04 04/18 05/02 05/16

Week Ending Date

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

% IL

I

Region 7Region 6Region 5Region 4Region 3Region 2Region 1

Flu Surveillance Regions

Region 1 Region 2 Region 3 Region 4Region 5 Region 6 Region 7

ALAMANCE

ALEXANDER

ALLEGHANY

ANSON

ASHE

AVERY

BEAUFORT

BERTIE

BLADEN

BRUNSWICK

BUNCOMBE

BURKE

CABARRUS

CALDWELL

CAMDEN

CARTERET

CASWELL

CATAWBA CHATHAM

CHEROKEE

CHOWAN

CLAY

CLEVELAND

COLUMBUS

CRAVEN

CUMBERLAND

CURRITUCK

DAREDAVIDSON

DAVIE

DUPLIN

DURHAM

EDGECOMBE

FORSYTH

FRANKLIN

GASTON

GATES

GRAHAM

GRANVILLE

GREENE

GUILFORD

HALIFAX

HARNETT

HAYWOOD

HENDERSON

HERTFORD

HOKE

HYDE

IREDELL

JACKSON

JOHNSTON

JONES

LEE

LENOIR

LINCOLN

MC DOWELL

MACON

MADISON MARTIN

MECKLENBURG

MITCHELL

MONTGOMERYMOORE

NASH

NEW HANOVER

NORTHAMPTON

ONSLOW

ORANGE

PAMLICO

PASQUOTANK

PENDER

PERQUIMANS

PERSON

PITT

POLK

RANDOLPH

RICHMOND

ROBESON

ROCKINGHAM

ROWAN

RUTHERFORD

SAMPSON

SCOTLAND

STANLY

STOKESSURRY

SWAIN

TRANSYLVANIA

TYRRELL

UNION

VANCE

WAKE

WARREN

WASHINGTON

WATAUGA

WAYNE

WILKES

WILSON

YADKIN

YANCEY

3

45

6

1

7

2


NC INFLUENZA-ASSOCIATED DEATHS

An influenza-associated death is defined for surveillance purposes as a death (adult or pediatric) resulting from aclinically compatible illness that was confirmed to be influenza by an appropriate laboratory or rapid diagnostic test withno period of complete recovery between the illness and death.

NC Influenza-Associated Deaths*

Influenza-Associated DeathsThis Week (01/26/2020 – 02/01/2020)

Total Influenza-Associated DeathsThis Season (starting 09/29/2019)

5 63

*These numbers are based on reports submitted by providers to the NC Division of Public Health. Data arepreliminary and subject to change as updated information becomes available. Deaths that occurred on or after

09/29/2019 will be reflected in this report for the 2019-2020 season.

Reported by Age Group

Laboratory Confirmed Influenza-Associated Deaths

01

0

10

15

37

0-4 5-17 18-24 25-49 50-64 65+

Age Group (Years)

0

3

6

9

12

15

18

21

24

27

30

33

36

No

. of

Rep

ort

ed D

eath

s

Reported by Week of Death

Laboratory Confirmed Influenza-Associated Deaths

1

0 0 0 0

1

0

2

3

0

2

0

4

10

13 13

9

5

10/0510/12

10/1910/26

11/0211/09

11/1611/23

11/3012/07

12/1412/21

12/2801/04

01/1101/18

01/2502/01

02/0802/15

02/2202/29

03/0703/14

03/2103/28

04/0404/11

04/1804/25

05/0205/09

05/16

Week Ending Date

0123456789

1011121314

No

. of

Rep

ort

ed D

eath

s

PediatricAdult


ILI Network Provider Locations, NC 2019-2020

Non-Hospital Participants In North Carolina’s Influenza Sentinel Surveillance Program Report Data To CDC

LOCAL HEALTH DEPARTMENT/DISTRICT OFFICES - 23

Alamance County Health Department

Cabarrus Health Alliance

Caldwell County Health Department

Craven County Health Department

Duplin County Health Department

Franklin County Health Department

Henderson County Health Department

Johnston County Health Department

Lee Primary Care

Montgomery County Health Department

Northampton County Health Department

Orange County Health Department

Pender County Health Department

Pitt County Public Health Center

Richmond County Health Department

Rockingham County Health Department

Rowan County Health Department

Stanly County Health Department

Stokes Family Health Center

Surry County Health and Nutrition Center

Union County Health Department

Wake County Health Department, Children’s Clinic

Wilkes County Health Department

PRIVATE PRACTITIONERS - 24

Bakersville Community Medical Center

Blue Cross and Blue Shield of N.C.

Blue Ridge Community Health Services

Butner-Creedmoor Family Medicine

Catawba Family Care

Celo Health Center

Colerain Primary Care

Creswell Primary Care

Dilworth Pediatrics

Duke Primary Care Oxford

ECU Brody School of Medicine – Department ofPediatrics

Family Care Center

Go Health Forsyth

Group Family Medicine - MAHEC

Haywood Pediatric and Adolescent Medicine Group, PA

Hot Springs Health Program

MEDAC Health Services at Shipyard Blvd.

MEDAC Health Services at Porter’s Neck

MEDAC Health Services at Military Cutoff

Murfreesboro Primary Care

Roanoke Chowan Community Health Center

SAS Institute Health Care Center

Sisters of Mercy Urgent Care, South

Spruce Pine Health Center

COLLEGES AND UNIVERSITIES STUDENT HEALTHPROGRAMS - 15

Appalachian State University Student Health Services

Davidson College Student Health Center

ECU Student Health Services

Elizabeth City State University Student Health Services

Elon University R. N. Ellington Health and CounselingCenter

Fayetteville State University

Meredith College Student Health Center

NC Agricultural &Technical State University StudentHealth Services

NC State University Student Health Services

UNC-Chapel Hill Student Health Services

UNC-Charlotte Student Health Services

UNC-Greensboro Student Health Services

UNC-Pembroke Student Health Services

Wake Forest University Student Health Services

Winston-Salem State University Student Health Services

north carolina weekly influenza surveillance …n.c. weekly influenza summary - january 4, 2020 8...

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