Community Health > Disease Prevention

Respiratory Illness

Influenza, COVID-19, and RSV are viral respiratory diseases that can cause more severe respiratory disease outcomes.

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Respiratory Illness

Community Immunization Clinic Calendar

Where Can I Get Respiratory Immunizations?

Community Activity Levels

Condition Status Current Week (5.26.24-6.1.24) Illness Activity Level Threshold*
COVID-19 Low 0.30% 4.00%
Influenza Low 0.30% 1.20%
RSV Low 0.00% 0.30%

* When the percent of ED visits for a virus is above its activity level threshold, it is a sign that there is increased spread of that virus. For further information, please see the Activity Level Threshold Calculation Methodology below.

You can view past and current percent of ED levels in Whitman County for Respiratory Illness (Flu, COVID, & RSV) at the "Disease Activity for Whitman County" dashboard below.

Activity Level Threshold Calculation Methodology

Disease activity level thresholds for COVID-19, influenza, and RSV are calculated using the Moving Epidemic Method (MEM). The epidemic threshold is calculated at the start of the respiratory season using data from the previous five seasons.

Because COVID-19 is a new disease that started transmission in 2020 and does not yet have a clear seasonal pattern, the MEM multiple wave algorithm was used to classify waves. To calculate the epidemic threshold for COVID-19 for the 2023-24 season, we used data from February 2020 to September 2023.

To calculate the transmission alert thresholds for influenza and RSV for the 2023-24 season, we used data from the following seasons: 2017-18, 2018-19, 2019-20, and 2022-23. We excluded the 2020-21 and 2021-22 seasons because of the COVID-19 pandemic.

As our understanding of respiratory viruses continues to grow, we will re-evaluate and update our methods using newer scientific methods as they become available. Because the COVID-19 threshold was calculated from pandemic levels of disease, the threshold will change over time as disease levels change and become more endemic.

Respiratory Illness

Community Immunization Clinic Calendar

Program Contact

If you have any questions, please contact us at 509-397-6280 or email at

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