Nebraska Influenza Surveillance Report 2019 20 Influenza ...
Nebraska Influenza Surveillance Report 2020-21 Influenza Season, Week 46
(All data are preliminary and may change as more reports are received.)
November 20, 2020
Synopsis for Week Ending November 14th, 2020
The Nebraska influenza surveillance system is a collaborative effort between DHHS and its many partners in the state including, local health departments, public health and clinical laboratories, vital statistics offices, healthcare providers, clinics and emergency departments. Indicators from Nebraska's influenza surveillance systems (laboratory testing, sentinel provider visits, influenza hospitalizations, emergency department visits, and school absences due to illness) showed that influenza levels are very low but influenza continues to be an important public health issue to be aware of during the COVID-19 pandemic.
SUMMARY STATS
Percent of influenza tests positive
Percent of RSV rapid tests positive Percent of outpatient visits for ILI1 Influenza-associated hospitalizations2 Percent of emergency department visits due to ILI3 Percent school absence due to illness4
0.4% (13/3249) 0.84% (4/479) 1.5% (state baseline 1.99%) 109 inpatients (441 cumulative)
1.83% 3.05%
Number of schools with 11% absence due
to illness
43
Number of influenza and other respiratory disease outbreaks reported (Cumulative) 0
Influenza-associated mortality-all ages
(Cumulative)5
0
1 ILI: Influenza-like Illness is defined as a fever of 100? F as well as cough and/or sore throat 2 Hospitalizations due to ILI are voluntarily reported through a weekly survey of Nebraska hospitals 3 Visits due to ILI are collected by syndromic surveillance received from Nebraska hospitals 4 Percent school absence due to illness are reported through a weekly survey of Nebraska schools 5 Deaths in which influenza is listed on the death certificate and lab confirmed. This is an underestimate of influenza-related deaths Cumulative is 9/27/2020-current week
National Summary: Please see
International Summary: Please see
2020 Novel Coronavirus Information: ncov Please visit the DHHS influenza webpage for more influenza information.
Page 1
Laboratory Surveillance
Voluntary submission of isolates by clinical virology laboratories to the Nebraska Public Health Laboratory (NPHL) for influenza surveillance. Reporting by Nebraska laboratories of positive test results and total number of respiratory virus specimens tested.
Influenza Diagnostic Testing
This surveillance system counts influenza diagnostic tests performed and if they are positive or negative. When there is little influenza circulating in the community, specimens that test positive on a rapid antigen test have a greater likelihood of being "false positive" and require careful clinical correlation. As influenza circulates more widely in the population, specimens that test positive are more likely to be "true positive" and reflect actual influenza infection.
69 of 85 hospital laboratories reported data for the past week. Of the 3,249 influenza diagnostic tests reported, 0.15% (n=5) were positive for influenza A and 0.22% (n=8) positive for influenza B.
Influenza Diagnostic Test Surveillance 2020-2021
Season-to-Date (September 27- November 14, 2020) Totals
All Influenza
Influenza A
Influenza B
Total Positive Total Tests Performed % Positive
41 10239 0.40%
percentage of flu positives
16
25
39.02%
60.98%
Surveillance Week Data (Nov. 8-14, 2020)
All Influenza
Influenza A
Influenza B
Total Positive
13
percentage of flu positives
Total Tests Performed
3249
5
8
% Positive
0.40%
38.46%
61.54%
RSV
Total Positive Total Tests Performed % Positive
Season-to-Date
12 3466 0.35%
Surveillance Week
4 479 0.84%
Of the specimens that were able to be typed for influenza type A, there has been: 1 flu A H3N2 0 flu A 2009 H1N1
0 influenza B specimens were tested to determine lineage 0 B/Yamagata 0 B/Victoria
Page 2
Laboratory Surveillance
Year-to-Year Comparison
2000
1800
Positive Influenza Laboratory Tests by Nebraska Laboratories
2018-19 2019-20 2020-21
1600
1400
Positive Influenza
1200
1000
800
600
400
200
0 40 41 42 43 44 45 46 47 48 49 50 51 52 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Positive Influenza Laboratory Tests by
MMWR Week
Nebraska Laboratories
2018-19 2019-20 2020-21 150
Positive Influenza
100
50
0
43
44
45
46
MMWR Week
number positive tests number positive tests
Total Positive Influenza A Laboratory Tests
by Nebraska Laboratories
1,800
2018-19
2019-20
2020-21
1,600
1,400
1,200
1,000
800
600
400
200
0 40 42 44 46 48 50 52 2 4 6 8 10 12 14 16 18 20
MMWR Week
Total Positive Influenza B Laboratory Tests
by Nebraska Laboratories
1,200
2018-19
2019-20
2020-21
1,000
800
600
400
200
0 40 42 44 46 48 50 52
2468 MMWR Week
10 12 14 16 18 20
Page 3
Outpatient Surveillance--ILINet
Voluntary reporting by a statewide network of sentinel clinicians of the number of patients presenting with influenza-like illness (ILI) and the total number of patient visits by age group each week.
Sentinel Provider Surveillance: 7 of the 17 sentinel-site physician offices in Nebraska which are designated to track ILI reported data for the surveillance week. Of 1,070 total patient visits reported, 16 (1.50%) met ILI criteria.
Percent Positive
Percentage of Visits for Influenza-like Illness (ILI) Reported by the
Nebraska Outpatient Influenza-like Illness Surveillance Network (ILINet)
2018-2021
7
2018-19
6
2019-20
2020-21
5
State Baseline
4
3
2
1
0
MMWR Week
ILINet for week ending Nov. 14th, 2020
Age 0-4 Age 5-24 Age 25-49 Age 50-64 Age over 64 Total ILI Total patients
1
2
1
8
4
16
1070
0.09% 0.19% 0.09% 0.75%
0.37%
% ILI 1.50%
Federally Qualified Health Centers (FQHCs) Syndromic Surveillance
Page 4
Emergency Department Syndromic Surveillance
Monitoring influenza-like illness (ILI) syndromic surveillance data received by emergency departments. The ILINet electronic ILI report includes 64 facilities percent of ILI visits for MMWR week 46: 1.83%
Page 5
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