Situational Overview for the 2024-2025
Season
Report Updated on 03-13-2025
Changes in the last week
FluSurv-NET Hospitalizations in Salt Lake County
| Type | Hospitalized Influenza Cases | Influenza-Related Deaths |
|---|---|---|
| A | 891 | 34 |
| A&B | <5 | 0 |
| B | 13 | 0 |
| Type | Influenza Subtype | Hospitalized Influenza Cases | Influenza-Related Deaths |
|---|---|---|---|
| A | Flu A | 325 | 10 |
| A | Flu A H1N1 | 210 | 5 |
| A | Flu A H3 | 356 | 19 |
| A&B | Multiple Subtypes | <5 | 0 |
| B | Flu B | 11 | 0 |
| B | Flu B Victoria | <5 | 0 |
A double asterisk (**) indicates that a column has been suppressed due to low counts. If a column has is empty without a suppression mark it indicates that no cases of that category have been detected this season.
In this figure, weeks with between 1 and 4 cases will show 4 cases to protect privacy.
Flu types with low counts are suppressed from this figure. Complete age breakdowns for hospitalizations can be found under the ‘Demographics’ tab.
Navigating Tables and Graphs
Most of this dashboard is interactive. To get more detailed information about any of the data points shown in a graph or map, hover over (or click) the data point with your mouse cursor. You can also zoom in and select specific date ranges or geographic breakdowns using the mouse cursor. For graphs with a legend, you can isolate any category by double-clicking that category in the legend. To reset the graph, double click anywhere in the legend. To remove one category on a graph, single-click that category in the legend. Sort tables by clicking on column headings. You may also search using the Search box in the top right-hand corner.
In the early season, some features of the report are removed until case count thresholds are met.
Data is lagged a week to allow for case ascertainment.
Data Suppression
Low counts are suppressed to protect potentially identifiable information. A double asterisk (**) indicates that a figure has been suppressed.
Data sources
Hospitalized case data is pulled from the Influenza Hospitalization Surveillance Network (FluSurv-Net). More details about this surveillance system can be found on the CDC Influenza Hospitalization Surveillance Webpage.
Influenza-Like Illness (ILI) is a form of syndromic surveillance that captures the number of people seeking care at an emergency department (ED), InstaCare, or Urgent Care with symptoms matching influenza. This is compared to all visits in the ED, InstaCare or Urgent Care to generate a percentage (ILI %) that is tracked in the above graph.
Risk Factors for Hospitalized Influenza Cases
A double asterisk (**) indicates that a column has been suppressed due to low counts. If a column has is empty without a suppression mark it indicates that no cases of that category have been detected this season.
A double asterisk (**) indicates that a column has been suppressed due to low counts. If a column has is empty without a suppression mark it indicates that no cases of that category have been detected this season.
Influenza Burden
Below is the estimated burden of influenza cases in Salt Lake County.
The methods used to calculate these estimates follow CDC’s
methodology*
and incorporate Salt Lake County-specific influenza hospitalization
testing practices to account for under-detection of hospitalized
influenza illnesses.
* Multiplier input is from 2018-2019 due to
the COVID-19 pandemic.
| Type | Number of Illnesses |
|---|---|
| Hospitalized Illnesses | 1600 |
| Outpatient Medically-Attended Illnesses | 84100 |
| Community Illnesses (non-medically-attended) | 90600 |
Influenza Severity Metrics
Influenza Severity Metrics
The severity metric for Salt Lake County is calculated using the Moving Epidemic Method (MEM). Indicators used for severity assessment include deaths (influenza-related deaths using CDC FluSurv-Net definitions), outpatient cases (influenza-like illness from Germwatch) and inpatient cases (influenza-related hospitalizations from FluSurv-NET).
A double asterisk (**) indicates that a column has been suppressed due to low counts. If a column has is empty without a suppression mark it indicates that no cases of that category have been detected this season.
Pneumonia, Influenza, and COVID Mortality (PIC)
Pneumonia, Influenza or COVID-19 (PIC) Mortality is the number of
decedents in a MMWR week with Pneumonia, Influenza, or COVID-19 listed
on their death certificates divided by the total number of decedents in
a MMWR multiplied by 100 in order to get a percent of all deaths due to
PIC.
2024-2025 Season: Pneumonia, Influenza, and
COVID Mortality for Salt Lake County
Historical Pneumonia, Influenza, and COVID
Morality for Salt Lake County Thresholds
US indicators used for severity assessment include outpatient cases (influenza-like illness from ILINET), inpatient cases (influenza-related hospitalizations from FluSurv-NET) and deaths (influenza and pneumonia related deaths from NCHS).