Please see the interactive influenza dashboard for more details on ...
[Pages:4]AARRIZIZOONNAA??ININFFLLUUEENNZZAA&&RRSSVVSSUUMMMMAARRYY
WWeeekek4140(1(09//93/02/0220218? ?101/01/56//22002128))
2022?2023 Influenza Season (10/2/2022 ? 9/30/2023)
Please see the interactive influenza dashboard for more details on current and past seasons in Arizona.
Influenza & RSV synopsis
? Influenza activity remains low. ? To receive weekly updates, subscribe to the Flu & RSV report at email. ? The cases included in this report represent a small proportion of the true number of cases of
influenza. Many people do not visit the doctor when ill and doctors should not be expected to run tests on all patients exhibiting influenza-like symptoms.
Arizona Influenza Intensity Levels
0 cases
1 ? 18 cases
19 ? 133 cases 134 ? 691 cases
692+ cases
Arizona Department of Health Services
1
Laboratory-Confirmed Influenza Activity by Season
Number of Cases
In the past week, there were 81 laboratory confirmed influenza cases.
2,500
5 Season Average (2017?2021)
2020-2021
2021-2022
2022-2023
2,000
1,500
1,000
500
0
Week of Report
Number of Lab-Confirmed Influenza Cases Reported, by Week of Report: 2017?2023
Table 1: Reported Laboratory-Confirmed Influenza Cases Compared to Past Weeks and Seasons
Cumulative Season Total Current Week Total
2022?2023
2021?2022
5 season average % increase, compared to 2021?
2022 season % increase, compared to a
typical influenza season % increase, compared to last
week
133 38 43 250%
211%
156%
81 22 22 268%
275%
56%
Arizona Department of Health Services
2
Laboratory-Confirmed RSV Activity by Season
In the past week, there were 322 laboratory confirmed RSV cases.
600
5 Season Average (2017?2021)
2020-2021
2021-2022
500
2022-2023
400
Number of Cases
300
200
100
0
Week of Report
Number of Lab-Confirmed RSV Cases Reported, by Week of Report: 2017?2023
Table 2: Reported Laboratory-Confirmed RSV Cases Compared to Past Weeks and Seasons
Cumulative Season Total Current Week Total
2022?2023
2021?2022
5 season average % increase, compared to 2021?
2022 season % increase, compared to a
typical season
583 626 131 -7%
344%
322 347 73 -7%
341%
Arizona Department of Health Services
3
% of Visits for ILI Number of Sites Reporting
Influenza-Like Illness (ILI) Surveillance from Sentinel Outpatient Providers
ILI percent was at baseline at 1.3% in week 40.
Percentage of Visits for ILI at Sentinel Providers, 2022-2023, Arizona
ILI %
ILI% Baseline
Threshold (AZ)
Number of Sites Reporting
9.0
50
8.0
7.0
40
6.0 30
5.0
4.0 20
3.0
2.0
10
1.0
0.0
0
Week Ending Date *Note: The baseline is defined as the mean of the state ILI% in weeks in the 2018?2021 influenza seasons in which two or more consecutive weeks each accounted for less than 2% of the season's total number of specimens testing positive for influenza at the Arizona State Public Health Laboratory. The epidemic threshold is defined as the mean plus two standard deviations.
About the Data:
2022?2023 Influenza Season: The season is defined by surveillance weeks. The first day of the 2022?2023 influenza season was October 2, 2022, or week 40 and the 2022?2023 surveillance season will continue through September 30, 2023, or week 39.
Intensity Levels: Indicator of the intensity of flu activity in Arizona. The current seasonweekly case counts are classified into ranges that are calculated based on the average of the 5 previous season's data (2017-2022).
Influenza-associated Pediatric Deaths: Influenza-associated pediatric deaths are reportable to the public health departments in Arizona. The 2008?2009 and 2009?2010 seasons showed an increase in influenza -associated deaths in children related to the circulation of the 2009 H1N1 strain. Zero to five deaths were reported in each of the other seasons since 2004.
Influenza-like illness: Defined as a fever of at least 100?F plus either a cough or a sore throat. In weeks when a relatively low number of enrolled facilities report data, the ILI proportion may not be as representative of Arizona activity as for other weeks. The state ILI baseline is 1.3% and the epidemic threshold is 2.5%*.
Arizona Department of Health Services
4
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