Yellowstone County COVID-19 Information Updated through week ending May 15, 2021

New Cases by Age 0-19 20-39 40-59 60-69 70+ % that are 0-19 140 30% 5 27% 120 16 4 25% 23% 2 16 8 11 100 3 20% 5 10 15 35 8 20% 3 18% 25 % that are 0-19 13 4 33 17% 80 17% 27 11 31 28 14% 29 15% Cases 60 12% 25 49 47 10% 48 34 40 37 39 42

30 5% 20 27 28 28 20 19 11 15 14 0 0% Mar 21 - Mar 27 Mar 28 - Apr 3 Apr 4 - Apr 10 Apr 11 - Apr 17 Apr 18 - Apr 24 Apr 25 - May 1 May 2 - May 8 May 9 - May 15 12 13 14 15 16 17 18 19 2021

New COVID-19 cases in Yellowstone County are grouped into age ranges denoted by colors on this bar graph. The red line shows the percentage of new cases in newborns to school age children (ages 0-19) as a percentage of the total number of cases.

New Cases of School Age Grade School (6-10) High School (14-19) Middle School (11-13) Preschool (0-5) 30

3 25 4 5

5 4 9 20 1

4 4 15 2 Cases 3 13 14 4 9 1 11 10 3 10

4 6 7 5

6 5 5 5 5 4 3 3 0 Mar 21 - Mar 27 Mar 28 - Apr 3 Apr 4 - Apr 10 Apr 11 - Apr 17 Apr 18 - Apr 24 Apr 25 - May 1 May 2 - May 8 May 9 - May 15 12 13 14 15 16 17 18 19 2021

New cases among Yellowstone County school-age children are grouped into color-coded categories based on ages from preschool (0-5) through high school (14-19). Yellowstone County COVID-19 Information Updated through week ending May 15, 2021

New Cases per 100,000 New Cases / 100,000 Week Average Yellow (10) Red (25) 26 24 At the end of MMWR Week 16 and going forward, new COVID-19 positive cases reported to 22 RiverStone Health on Saturdays and Sundays will be included on Monday’s case count. 20 18 16 14 12 12 11 10 10 10 9 9

New Cases / 100,000 8 8 8 6 4 2 3 4 17 14 7 7 3 2 6 12 14 11 5 6 0 17 9 7 16 14 5 10 7 11 10 11 9 4 8 11 9 9 17 14 0 0 15 20 14 16 15 0 0 20 17 12 9 16 0 0 18 17 11 11 7 0 0 Fri Fri Fri Fri Fri Fri Fri Fri Sat Sat Sat Sat Sat Sat Sat Sat Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Sun Sun Sun Sun Sun Sun Sun Sun Mon Mon Mon Mon Mon Mon Mon Mon Wed Wed Wed Wed Wed Wed Wed Wed Mar 21 - Mar 27 Mar 28 - Apr 3 Apr 4 - Apr 10 Apr 11 - Apr 17 Apr 18 - Apr 24 Apr 25 - May 1 May 2 - May 8 May 9 - May 15 12 13 14 15 16 17 18 19 2021

The number of new cases each day, per 100,000, is shown as a bar graph. The brown line represents the weekly average daily case count per 100,000. This figure comes from the number of cases per day, divided by 161,300 (population of Yellowstone County), multiplied by 100,000, averaged over a 7-day period. The yellow dotted line indicates 10 new cases per 100,000. The red dotted line indicates a threshold of 25 new cases per 100,000. The orange dot is the average of new cases per 100,000 for the previous 7-day period.

Positivity Rate Tests Positives Positivity Rate Yellow (5% ) Red (10% ) 4,500 11.00%

4,000 10.00% 9.00% 3,500 8.00% 3,000 7.00% Positivity Rate

2,500 6.00% 4,469 4.94% 4.90% 2,000 4.53% 5.00% 3,624 3,631 3,779 3,6504.27% 3.95% 3,3603.84%

Number of Tests 3.72% 3,240 4.00% 1,500 3.31% 2,916 3.00% 1,000 2.00% 500 1.00% 143 129 135 171 148 160 156 143 0 0.00% Mar 21 - Mar 27 Mar 28 - Apr 3 Apr 4 - Apr 10 Apr 11 - Apr 17 Apr 18 - Apr 24 Apr 25 - May 1 May 2 - May 8 May 9 - May 15 12 13 14 15 16 17 18 19 2021

Testing numbers are supplied by the State of Montana. The blue bars represent the total number of positive and negative COVID-19 tests each week in Yellowstone County, while the orange bars represent the number of positive cases in Yellowstone County. The solid red line indicates the weekly positivity rate, which equals the number of weekly positive tests divided by the total number of positive and negative tests conducted that week. The yellow dotted line indicates a positivity rate of 5%. The red dotted line indicates a positivity rate of 10%. Yellowstone County COVID-19 Information Updated through week ending May 15, 2021

Hospital Status Non-ICU ICU no Vent ICU Vent Deaths (Week) 30

25 8 9 9 8

0 7 20 2 5 1 0 4 2 1 0 6 7 5 5 1 1 2 6 7 1 5 6 7 1 3 4 2 2 2 3 6 2 2 15 1 1 3 1 1 2 2 3 2 3 1 4 1 1 2 2 1 5 2 1 1 1 3 0 1 2 2 5 3 3 1 1 2 3 1 1 10 2 2 2 0 1 1 0 2 3 1 2 4 0 18 19 19 Number of Patients 3 3 1 2 3 1 17 17 17 3 3 2 2 2 1 14 14 14 14 14 15 14 14 15 14 1 1 1 12 12 13 13 12 12 12 13 12 12 5 1 1 1 2 2 1 2 11 10 10 10 9 9 9 9 1 8 9 8 8 9 6 7 7 6 6 0 7 7 1 7 7 5 5 1 4 4 5 4 2 2 3 1 1 0 Fri Fri Fri Fri Fri Fri Fri Fri Sat Sat Sat Sat Sat Sat Sat Sat Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Tue Thu Sun Sun Sun Sun Sun Sun Sun Sun Mon Mon Mon Mon Mon Mon Mon Mon Wed Wed Wed Wed Wed Wed Wed Wed Mar 21 - Mar 27 Mar 28 - Apr 3 Apr 4 - Apr 10 Apr 11 - Apr 17 Apr 18 - Apr 24 Apr 25 - May 1 May 2 - May 8 May 9 - May 15 12 13 14 15 16 17 18 19 2021

The total of each bar represents the total number of people hospitalized in Yellowstone County for COVID-19. Some of those patients may be from other counties or states. The blue represents the number of patients with COVID-19 who are hospitalized, but who are not in an Intensive Care Unit (ICU). The orange represents the number of patients in ICU with COVID-19, but not on a ventilator. The red represents the number of patients with COVID-19 who are on a ventilator. The purple circles indicate the number of Yellowstone County residents who have died due to COVID-19 each week, whether or not they were hospitalized at the time of death. Due to timing of notification, deaths may not be reflected immediately and are recorded as notification occurs.

Emergency Department Disease Surveillance 2019 2020 2021 7.0%

6.0%

5.0%

4.0%

3.0% Percent of Patients 2.0% 1.5% 1.1% 1.0% 0.7% 0.6% 0.8% 0.7% 0.8% 0.3% 0.0% 12 13 14 15 16 17 18 19 MMWR Week

This chart shows the percentage of Yellowstone County Emergency Department (ED) visits where the chief complaint or symptom was fever or chills and at least one of these other symptoms: cough, difficulty breathing, shortness of breath. The blue line indicates ED visits each week for these symptoms in 2019. The green line represents ED visits for similar symptoms for the same time period in 2020. The thick red line indicates ED visits each week for these symptoms in 2021. Data supplied by the State of Montana collected from Yellowstone County hospitals.