RESPIRATORY VIRUS SURVEILLANCE REPORT
Wisconsin Department of Health Services | Division of Public Health
Bureau of Communicable Diseases | Communicable Diseases Epidemiology Section
www.dhs.wisconsin.gov/dph/bcd.htm | [email protected]
Week 52: Ending December 28, 2019
P-02346
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 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 52, 2019
October 1, 2019 to present
Wisconsin 0 0
Nationwide 5 27
ILI: INSUFFICIENT DATA
AT-A-GLANCE:
Weekly Respiratory Report Description
Predominant Viruses of the Week: Influenza B and RSV are the predominant viruses this week.
CURRENT ALERTS:
Influenza B (Victoria lineage) continues to be
the predominant influenza virus in Wisconsin.
Influenza B viruses cause increased morbidity
among the younger population.
155 influenza-associated hospitalizations were
reported last week.
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 2019
Influenza and Pneumonia Deaths, Wisconsin
INFLUENZA AND PNEUMONIA-ASSOCIATED MORTALITY
Influenza- and pneumonia-associated deaths by influenza season year and week, Wisconsin
Influenza season week
Influenza-
associated
deaths (I)
Pneumonia-
associated
deaths (P)
Percent I+P of
all deaths
Baseline I+P
of all deaths
Threshold I+P
of all deaths
50 2 54 5.3% 5.4% 6.1%
51
1 75 8.9% 5.5% 6.2%
52
(Preliminary data) 0 27 6.9% 5.6% 6.3%
Seasonal total 11 798 4.9% NA NA
Data source: DPH, Office of Health Informatics
Influenza- and pneumonia-associated deaths by most recent influenza season week,
Wisconsin, 2019-2020 season
3%
4%
5%
6%
7%
8%
9%
10%
11%
201
6-4
0
201
7-0
2
201
7-1
6
201
7-3
0
201
7-4
4
201
8-0
6
201
8-2
0
201
8-3
4
201
8-4
8
201
9-1
0
201
9-2
4
201
9-3
8
Percent of deaths associated with
influenza and pneumonia
Influenza season year-week
Percent of deaths associated with influenza and pneumonia Baseline Threshold
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 2019
Wisconsin positive influenza results and subtypes by PCR
Cumulative number of positive influenza PCR tests by subtype September 1, 2019 to present
WISCONSIN LABORATORY SURVEILLANCE
FOR RESPIRATORY VIRUSES BY PCR
0%
5%
10%
15%
20%
25%
0
300
600
900
1,200
1,500
8/24 9/21 10/19 11/16 12/14 1/11 2/8 3/7 4/4 5/2
% P
osi
tive
by
PC
R
Nu
mb
er o
f 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
30% 70%
A (2009 H1N1) A (H3N2) A (Unknown) B (Victoria) B (Yamagata) B (Unknown)
Total positive (n) 58 47 813 88 8 2078 3092
% of total positive 2% 2% 26% 3% 0% 67% 100%
Influenza A: Influenza B:Total
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 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 5433 1161 21.4% 3 10 335 10 0 794
Respiratory virus Tested
Positive
(n)
Positive
(%) Parainfluenza 1 Parainfluenza 2 Parainfluenza 3 Parainfluenza 4
Parainfluenza 800 29 3.6% 8 1 0 20
Respiratory virus Tested Positive Positive CoV 229E CoV OC43 CoV NL63 CoV HKU1
Coronavirus (CoV) 388 20 5.2% 0 0 1 19
Respiratory virus Tested Positive (n) Positive (%)
RSV 1746 421 24.1%
Human metapneumovirus 821 42 5.1%
Rhino-enterovirus 808 66 8.2%
Adenovirus 388 9 2.3%
Week 52: Ending on December 28, 2019
0%
5%
10%
15%
20%
25%
30%
11/23 11/30 12/7 12/14 12/21 12/28
% P
osi
tive
by
PC
R (3
-we
ek
mo
vin
g av
era
ge)
Week ending
― Influenza― RSV― hMPV- - Rhino-Entero― Adenovirus- - Parainfluenza- - Coronavirus
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 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
1181 109 149 258 21.8% 268 71 26.5% 3.9% 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 3/8 3/29 4/19 5/10 5/31
Ave
rage
% I
LI
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
5%
10%
15%
20%
25%
30%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/8 3/29 4/19 5/10 5/31
% P
osi
tive
by
an
tige
n d
etec
tio
n
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 52: Ending December 28, 2019
WISCONSIN STATE SUMMARY
ILI activity trend analysis by influenza season, Wisconsin
Influenza-associated hospitalizations, Wisconsin Electronic Disease Surveillance System
September 1, 2019 to present
Reported cumulative influenza-associated hospitalizations by influenza season, Wisconsin
A (2009
H1N1)
A
(H3N2)
A
(Unknown)B
Not
reported
<1 13 1 0 2 8 2 3 1 0 0
1-4 35 0 0 9 19 7 7 2 0 0
5-17 41 2 0 5 21 13 4 1 0 0
18-49 105 4 1 27 46 27 18 6 8 2
50-64 98 9 4 43 31 11 15 4 0 0
65+ 167 6 12 83 58 8 17 2 0 0
Total 459 22 17 169 183 68 64 16 8 2
Postpartum
(≤6 weeks)
Age group
(years)
Total
reported
(n)
Influenza subtypeAdmitted
to ICU
Required
mechanical
ventilation
Pregnant
0
200
400
600
800
44 45 46 47 48 49 50 51
Infl
ue
nza
-ass
oci
ate
d
ho
spit
aliz
ati
on
s, c
um
ula
tive
(n
)
Influenza season week
2015-2016
2016-2017
2017-2018
2018-2019
2019-2020
0%
1%
2%
3%
4%
5%
6%
40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
Ave
rage
% I
LI (3
-wee
k m
ovi
ng
ave
rage
)
Influenza season week
― 2015-16- - 2016-17- - 2017-18― 2018-19― 2019-20
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 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
339 32 22 54 15.9% 111 30 27.0% 3.2% 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 3/8 3/29 4/19 5/10 5/31
Ave
rage
% I
LI
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
5%
10%
15%
20%
25%
30%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/8 3/29 4/19 5/10 5/31
% P
osi
tive
by
an
tige
n d
etec
tio
n
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 52: Ending December 28, 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
505 53 86 139 27.5% 123 32 26.0% 2.7% 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 3/8 3/29 4/19 5/10 5/31
Ave
rage
% I
LI
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
5%
10%
15%
20%
25%
30%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/8 3/29 4/19 5/10 5/31
% P
osi
tive
by
an
tige
n d
etec
tio
n
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 52: Ending December 28, 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
312 18 36 54 17.3% 26 7 26.9% 4.0% 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 3/8 3/29 4/19 5/10 5/31
Ave
rage
% I
LI
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
5%
10%
15%
20%
25%
30%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/8 3/29 4/19 5/10 5/31
% P
osi
tive
by
an
tige
n d
etec
tio
n
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 52: Ending December 28, 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
25 6 5 11 44.0% 26 7 26.9% 5.4% 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 3/8 3/29 4/19 5/10 5/31
Ave
rage
% I
LI
Week ending
Baseline Threshold 3 per. Mov. Avg. (Average % ILI)
0%
5%
10%
15%
20%
25%
30%
35%
40%
45%
50%
9/1 9/22 10/13 11/3 11/24 12/15 1/5 1/26 2/16 3/8 3/29 4/19 5/10 5/31
% P
osi
tive
by
an
tige
n d
etec
tio
n
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 52: Ending December 28, 2019
Influenza vaccine composition 2019-2020:
The trivalent vaccines for use in the 2019-2020 influenza season contain the following:
A/Brisbane/02/2018 (H1N1)pdm09–like virus (updated)
A/Kansas/14/2017 (H3N2)-like virus (updated) B/Colorado/06/2017-like (Victoria lineage) virus
It is recommended that quadrivalent vaccines containing two influenza B viruses contain the above three viruses and:
B/Phuket/3073/2013-like virus (Yamagata lineage)
Cumulative percentage of Wisconsin residents who received 1 or more doses of
influenza vaccine, 2019-2020 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).
37%
40%
70%
0% 50% 100%
This season so far
2018-19 Total Vaccinated
Healthy People 2020 GoalHealthy People 2020 Goal
2018-2019Total Vaccinated
2019-2020 as of 12/28/2019
During this week, the vaccination rates for the 2019-2020 influenza vaccine season have been above the vaccination rates observed
during the 2018-2019 season.
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Division of Public Health Respiratory Virus Surveillance Report Week 52: Ending December 28, 2019
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).
Percentage of Wisconsin residents who received one or more doses of influenza
vaccine, by race and ethnicity and region, 2019-2020 influenza season
Southeastern Western Southern
22%
27%
20%
33%
23%
34%
37%Total
Non-Hispanic
Hispanic
White
Black
Asian
American Indian/
Alaska-Native
All of Wisconsin Northeastern Northern
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
0 years 1 to 4 years 5 to 17 years 18 to 49 years 50 to 64 years 65 years plus All Ages
2015-2016 2016-2017 2017-2018 2018-2019 2019-2020 as of current week
27%
25%
20%
35%
24%
36%
37%
22%
26%
18%
32%
22%
33%
35%
18%
26%
18%
34%
24%
35%
36%
27%
29%
20%
32%
24%
33%
41%
12%
27%
21%
32%
22%
33%
34%