RESPIRATORY VIRUS SURVEILLANCE REPORT
Wisconsin Department of Health Services | Division of Public Health
Bureau of Communicable Diseases | Communicable Diseases Epidemiology Section
dhs.wi.gov/dph/bcd.htm | [email protected]
Week 14: Ending April 6, 2019
P-02346
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
STATE OF WISCONSIN REGION V OF US
(WI, MN, IL, MI, OH, IN)
UNITED STATES
ILI: BELOW BASELINE ILI: HIGH LEVELS ILI: MODERATE LEVELS
INFLUENZA-ASSOCIATED
PEDIATRIC DEATHS REPORTED:
INFLUENZA LIKE ILLNESS (ILI) ACTIVITY
For National US influenza surveillance statistics visit: www.cdc.gov/flu/weekly/
Week 14, 2019
October 1, 2018 to present
Wisconsin 0 2
Nationwide 4 86
ILI: INSUFFICIENT DATA
AT-A-GLANCE:
Weekly Respiratory Report Description
Predominant Virus of the Week: Influenza A/H3 is the predominant virus this week.
CURRENT ALERTS:
Influenza activity is lowing declining
statewide.
257 flu-associated hospitalizations were
reported this week.
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
Influenza and Pneumonia Deaths, Wisconsin
INFLUENZA AND PNEUMONIA-ASSOCIATED MORTALITY
Influenza-associated deaths by week and influenza season, Wisconsin
Week 14, 2019 Cumulative, 2018-2019 season
Age group
(years)
Infl
uen
za
(I)
Pneumonia
(P)
Percent I+P of
all deaths
Influenza
(I)
Pneumonia
(P)
Percent I+P of
all deaths
0-4 0 0 0.0% 2 5 2.4%
5-17 0 1 33.3% 0 3 3.1%
18-49 0 2 4.4% 11 69 3.6%
50-64 2 4 4.8% 19 214 4.6%
65+ 5 47 7.4% 55 1497 5.8%
All ages 7 54 7.0% 86 1788 5.5%
Data source: DPH, Office of Health Informatics
0
10
20
30
40
50
60
70
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Num
ber o
f inf
luen
za-a
sso
ciat
ed d
eath
s
Influenza season week
― 2014-15
- - 2015-16- - 2016-17
― 2017-18― 2018-19
Influenza and pneumonia-associated deaths by age group, 2018-2019 season September 30, 2018 to April 6, 2019
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
Wisconsin positive influenza results and subtypes by PCR
Cumulative number of positive influenza PCR tests by subtype September 1, 2018 to present
WISCONSIN LABORATORY SURVEILLANCE
FOR RESPIRATORY VIRUSES BY PCR
0%
8%
16%
24%
32%
40%
0
500
1,000
1,500
2,000
2,500
9/1 9/29 10/27 11/24 12/22 1/19 2/16 3/16 4/13 5/11
% P
osi
tive
by
PC
R
Nu
mb
er
of
po
siti
ve d
ete
ctio
ns
Week ending
A (unknown subtype) A (H3N2 seasonal) A (H1N1) A (H3N2v)
B (unknown subtype) B (Victoria) B (Yamagata) Influenza % positive
96% 4%
A (2009 H1N1) A (H3N2) A (Unknown) B (Victoria) B (Yamagata) B (Unknown)
Total positive (n) 594 630 13230 9 23 592 15078
% of total positive 4% 4% 88% 0% 0% 4% 100%
Influenza A: Influenza B:Total
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
Trends in respiratory virus activity by PCR
WISCONSIN LABORATORY SURVEILLANCE FOR
RESPIRATORY VIRUSES BY PCR
Respiratory virus Tested Positive
(n)
Positive
(%)
Influenza A Influenza B
H3N2 2009 H1N1 Unknown Victoria Yamagata Unknown
Influenza 4692 1260 26.9% 64 26 1089 2 1 78
Respiratory virus Tested
Positive
(n)
Positive
(%) Parainfluenza 1 Parainfluenza 2 Parainfluenza 3 Parainfluenza 4
Parainfluenza 786 35 4.5% 2 4 26 3
Respiratory virus Tested Positive
(n)
Positive
(%) CoV 229E CoV OC43 CoV NL63 CoV HKU1
Coronavirus (CoV) 398 28 7.0% 7 14 7 0
Respiratory virus Tested Positive (n) Positive (%)
RSV 1375 56 4.1%
Human metapneumovirus 807 43 5.3%
Rhino-enterovirus 765 49 6.4%
Adenovirus 398 1 0.3%
Week 14: Ending on April 6, 2019
0%
8%
16%
24%
32%
40%
2/23 3/2 3/9 3/16 3/23 3/30 4/6
% P
osi
tive
by
PC
R (
3-w
ee
k m
ovi
ng
ave
rage
)
Week ending
― Influenza
― RSV― hMPV
- - Rhino-Entero― Adenovirus- - Parainfluenza
- - Coronavirus
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
WISCONSIN STATE SUMMARY
ILI activity trend analysis
Influenza and RSV trend analysis
Influenza rapid antigen tests RSV rapid antigen tests Influenza-like illness (ILI)
Tested Positive (n)
% Positive Tested Positive (n) % Positive ILI % Baseline Threshold Influenza A Influenza B Total
2191 488 54 542 24.7% 133 18 13.5% 2.7% 2.4% 3.6%
0%
1%
2%
3%
4%
5%
6%
7%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
Ave
rage
% IL
I
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
10%
20%
30%
40%
50%
60%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
% Positive by antigen detection
Week ending
3 per. Mov. Avg. (RSV) 3 per. Mov. Avg. (Influenza)
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
WISCONSIN STATE SUMMARY
ILI activity trend analysis by influenza season, Wisconsin
Influenza-associated hospitalizations, Wisconsin Electronic Disease Surveillance System
September 1, 2018 to present
Reported cumulative influenza-associated hospitalizations by influenza season, Wisconsin
A (2009
H1N1)
A
(H3N2)
A
(Unknown)B
Not
reported
<1 44 5 35 2 2 6 2 0 0
1-4 88 3 3 70 4 8 16 4 0 0
5-17 102 2 3 78 5 14 16 2 0 0
18-49 462 40 16 358 21 27 95 33 31 2
50-64 776 86 41 595 27 27 163 45 0 0
65+ 1545 115 112 1194 77 47 217 56 0 0
Total 3017 251 175 2330 136 125 513 142 31 2
Postpartum
(≤6 weeks)
Age group
(years)
Total
reported
(n)
Influenza subtypeAdmitted
to ICU
Required
mechanical
ventilation
Pregnant
0
1500
3000
4500
6000
7500
4 5 6 7 8 9 10 11 12 13 14
Infl
ue
nza
-ass
oci
ate
d
ho
spit
aliz
ati
on
s, c
um
ula
tive
(n)
Influenza season week
2014-2015
2015-2016
2016-2017
2017-2018
2018-2019
0%
1%
2%
3%
4%
5%
6%
7%
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Ave
rage
% IL
I (3
-wee
k m
ovi
ng
aver
age)
Influenza season week
― 2014-15
- - 2015-16- - 2016-17
― 2017-18― 2018-19
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
NORTHEASTERN REGION
ILI activity trend analysis
Influenza and RSV trend analysis
Influenza rapid antigen tests RSV rapid antigen tests Influenza-like illness (ILI)
Tested Positive (n)
% Positive Tested Positive (n) % Positive ILI % Baseline Threshold Influenza A Influenza B Total
987 203 27 230 23.3% 84 15 17.9% 2.6% 2.6% 4.0%
0%
1%
2%
3%
4%
5%
6%
7%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
Ave
rage
% IL
I
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
10%
20%
30%
40%
50%
60%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
% Positive by antigen detection
Week ending
3 per. Mov. Avg. (RSV) 3 per. Mov. Avg. (Influenza)
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
NORTHWESTERN REGION
ILI activity trend analysis
Influenza and RSV trend analysis
Influenza rapid antigen tests RSV rapid antigen tests Influenza-like illness (ILI)
Tested Positive (n)
% Positive Tested Positive (n) % Positive ILI % Baseline Threshold Influenza A Influenza B Total
386 81 3 84 21.8% 38 2 5.3% 2.5% 1.9% 3.2%
0%
1%
2%
3%
4%
5%
6%
7%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
Ave
rage
% IL
I
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
10%
20%
30%
40%
50%
60%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
% Positive by antigen detection
Week ending
3 per. Mov. Avg. (RSV) 3 per. Mov. Avg. (Influenza)
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
SOUTHEASTERN REGION
ILI activity trend analysis
Influenza and RSV trend analysis
Influenza rapid antigen tests RSV rapid antigen tests Influenza-like illness (ILI)
Tested Positive (n)
% Positive Tested Positive (n) % Positive ILI % Baseline Threshold Influenza A Influenza B Total
756 184 23 207 27.4% 8 0 0.0% 2.3% 2.9% 4.1%
0%
1%
2%
3%
4%
5%
6%
7%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
Ave
rage
% IL
I
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
10%
20%
30%
40%
50%
60%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
% Positive by antigen detection
Week ending
3 per. Mov. Avg. (RSV) 3 per. Mov. Avg. (Influenza)
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
SOUTHERN REGION
ILI activity trend analysis
Influenza and RSV trend analysis
Influenza rapid antigen tests RSV rapid antigen tests Influenza-like illness (ILI)
Tested Positive (n)
% Positive Tested Positive (n) % Positive ILI % Baseline Threshold Influenza A Influenza B Total
62 20 1 21 33.9% 3 1 33.3% 3.5% 2.1% 3.2%
0%
1%
2%
3%
4%
5%
6%
7%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
Ave
rage
% IL
I
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
10%
20%
30%
40%
50%
60%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/9 3/30 4/20 5/11 6/1
% Positive by antigen detection
Week ending
3 per. Mov. Avg. (RSV) 3 per. Mov. Avg. (Influenza)
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
Influenza vaccine composition 2018-2019:
The trivalent vaccines for use in the 2018-2019 influenza season contain the following:
A/Michigan/45/2015 (H1N1)pdm09-like virus
A/Singapore/INFIMH-16-0019/2016 A(H3N2)-like virus (updated)
B/Colorado/06/2017-like (Victoria lineage) virus (updated)
It is recommended that quadrivalent vaccines containing two influenza B viruses contain the above three viruses and:
B/Phuket/3073/2013-like virus (B/Yamagata lineage)
Cumulative percentage of Wisconsin residents who received 1 or more doses of
influenza vaccine, 2018-2019 influenza season
SEASONAL INFLUENZA VACCINATION
Data source: All influenza vaccination rates presented were calculated using data from the Wisconsin
Immunization Registry (numerator) and Wisconsin population estimates (denominator).
39%
37%
70%
0% 50% 100%
This season so far
2017-2018 Total Vaccinated
Healthy People 2020 GoalHealthy People 2020 Goal
2017-2018Total Vaccinated
2018-2019 Season as of Week Ending 03/23/2019
During this week, the vaccination rates for the 2018-2019 Influenza vaccine season have been above the vaccination rates observed during the 2017-2018 season.
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DIVISION OF PUBLIC HEALTH RESPIRATORY VIRUS SURVEILLANCE REPORT WEEK 14: ENDING April 6, 2019
Percentage of Wisconsin residents who received one or more doses of influenza
vaccine, by race and ethnicity and region, 2018-2019 influenza season
SEASONAL INFLUENZA VACCINATION
Percentage of Wisconsin residents who received one or more doses of influenza
vaccine, by age group and influenza season
Each season includes doses administered during the same time period (August 1 through May 3).
Northern Northeastern
12%
31%
24%
31%
27%
33%
35%
36%
36%
25%
36%
31%
37%
46%
Southeastern
23%
31%
22%
36%
30%
37%
39%
Western Southern
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 1 to 4 5 to 17 18 to 49 50 to 64 65 plus All Ages
2014-2015 2015-2016 2016-2017 2017-2018 2018-2019 as of current week
25%
32%
24%
35%
28%
36%
39%Regional Total
Non-Hispanic
Hispanic
White
Black
Asian
All of Wisconsin
American Indian/
Alaska-Native 32%
29%
26%
37%
29%
38%
40%
25%
31%
24%
34%
28%
36%
38%