Jeramey Jannene
WI Daily

Wisconsin Reports Biggest One-Day COVID-19 Case Increase

But no new deaths and hospitalizations fall to three month low.

By - Jul 4th, 2020 08:05 pm
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COVID-19. Credit: U.S. Army.

COVID-19. Credit: U.S. Army.

Wisconsin set a new single-day high for the number of new COVID-19 cases confirmed, but also saw no new deaths and the number of people actively hospitalized fall to a three-month low according to data released Saturday.

A total of 738 Wisconsin residents were newly-confirmed to have the disease in the past 24 hours according to data from the state Department of Health Services. It’s the largest total ever recorded in a single day, eclipsing an earlier high of 733 set on May 29th.

But the two days represent drastically different testing results. On May 29th the state had set a new high in the number of tests processed at 13,602. The percent of tests that came back positive, the positive case rate, was 5.39 percent.

Data released July 4th shows that only 6,822 tests were processed this time, below the 30-day average of 9,981. As a result, the positive case rate of 10.82 percent was more than double the May 29th rate.

The positive case rate of 10.82 percent is the highest figure reported in 63 days.

The data comes as DHS has now reported 16-straight days of the disease’s spread accelerating via the two-day positive case rate. It’s the first time the state has recorded five days in a row with greater than 500 newly confirmed cases.

The seven-day positive case rate climbed to 5.57 percent and the 14-day figure stands at 4.95 percent. The latter was last higher on June 2nd.

A total of 31,055 Wisconsin residents have now been confirmed to have the disease. DHS reports that 79 percent of individuals with a confirmed case have “recovered,” as defined by a documented abatement of symptoms or a diagnosis over 30 days ago.

And while three percent of individuals with a confirmed case have died, no new deaths were confirmed Saturday. The statewide total stands at 796, with a 30-day average of 5.67 deaths. In the 30 days prior an average of 9.1 deaths were recorded.

And the same day that new cases hit an all-time high, active hospitalizations hit a low not seen since April 2nd. As of Saturday afternoon there were 235 people hospitalized with the disease. Nineteen people were newly hospitalized in the past 24 hours.

How is there a surge in cases and a decline in deaths and hospitalizations?

“It is now well-understood that the risk of serious illness requiring hospitalization is lower for younger adults,” said Dr. Ryan Westergaard, Chief Medical Officer of the DHS Bureau of Communicable Diseases, via email in mid-June. For much of the past month a growing proportion of new cases have been confirmed in individuals under the age of 40. Individuals aged 20 to 29 represent the greatest number of cases.

DHS Secretary-designee Andrea Palm and Westergaard have also noted in press briefings that deaths and hospitalizations are lagging indicators of the spread of a disease. When someone is newly confirmed with the disease it may take three to five weeks for them to need hospitalization.

The City of Milwaukee’s weekly measurement of five disease indicators found a regression this week in the city’s fight against the disease and a weekly Milwaukee County epidemiological report confirmed a rapid increase in the number of cases in the county’s younger residents.

The disease’s spread remains greatest in Milwaukee on both a total number and per-capita basis.

According to DHS data, 1,266.3 out of every 100,000 Milwaukee County residents have tested positive for COVID-19 (up from 1,239) since the outbreak began. Brown County, which is anchored by Green Bay, has 1,153.6 cases per 100,000 residents (up from 1,142.5). Racine County has 1,123.9 cases per 100,000 residents (up from 1,122.8).

Kenosha (935.1), Walworth (657.2), Rock (554.5), Dodge (544.6), Lafayette (454.1), Trempealeau (438.2), Dane (434.7), La Crosse (432.8), Forest (432.5) and Winnebago (412.5) are the only other counties with more than 350 cases per 100,000 residents.

The statewide average of cases per 100,000 residents rose to 537.4 (up from 524.7 yesterday)

There are currently 979 ventilators and 365 intensive care unit (ICU) beds available across the state according to the Wisconsin Hospital Association. Since the data became publicly available on April 10th, WHA has reported an average of 944 ventilators and 393 ICU beds as available.

Charts and Maps

Data from DHS.

Percent of COVID-19 cases by hospitalization status

Hospitalization status Number of confirmed cases as of 7/4/2020 Percent of confirmed cases as of 7/4/2020
Ever hospitalized 3,574 12%
Never hospitalized 18,050 58%
Unknown 9,431 30%
Total 31,055 100%

Summary of COVID-19 cases by age group

Data from DHS.

Confirmed COVID-19 cases and deaths by gender

Data from DHS.

Confirmed COVID-19 cases and deaths by race

Data from DHS.

Confirmed COVID-19 cases and deaths by ethnicity

Data from DHS.

Number of positive cases and deaths by county

Wisconsin County Positive as of 7/4/2020 Negative as of 7/4/2020 Deaths as of 7/4/2020 Rate (positive cases per 100,000 people) as of 7/4/2020 Case fatality percentage (percent of cases who died) as of 7/4/2020
Adams 27 1,639 2 134.5 7%
Ashland 3 898 0 19.1 0%
Barron 36 3,840 1 79.6 3%
Bayfield 3 1,117 1 20.0 33%
Brown 2,997 32,811 42 1153.6 1%
Buffalo 8 1,016 2 60.8 25%
Burnett 4 916 1 26.2 25%
Calumet 117 3,661 2 234.9 2%
Chippewa 99 5,278 0 155.6 0%
Clark 86 2,227 7 249.3 8%
Columbia 94 6,150 1 165.0 1%
Crawford 41 2,471 0 251.7 0%
Dane 2,303 72,151 32 434.7 1%
Dodge 478 11,050 5 544.6 1%
Door 44 2,897 3 160.4 7%
Douglas 39 2,423 0 89.9 0%
Dunn 42 3,667 0 94.4 0%
Eau Claire 279 8,447 1 270.9 0%
Florence 4 437 0 92.2 0%
Fond du Lac 318 10,311 6 310.8 2%
Forest 39 591 3 432.5 8%
Grant 172 5,798 13 331.9 8%
Green 94 3,044 1 255.0 1%
Green Lake 37 1,750 0 197.3 0%
Iowa 36 2,582 0 152.4 0%
Iron 8 391 1 140.0 13%
Jackson 27 2,782 1 131.7 4%
Jefferson 274 7,007 4 323.7 1%
Juneau 43 3,064 1 162.8 2%
Kenosha 1,574 18,019 44 935.1 3%
Kewaunee 62 1,571 1 304.5 2%
La Crosse 510 12,722 0 432.8 0%
Lafayette 76 1,403 0 454.1 0%
Langlade 11 1,408 0 57.4 0%
Lincoln 14 1,885 0 50.3 0%
Manitowoc 108 6,590 1 136.0 1%
Marathon 201 7,184 1 148.6 0%
Marinette 65 4,486 3 160.3 5%
Marquette 23 1,159 1 151.2 4%
Menominee 7 1,230 0 152.9 0%
Milwaukee 12,083 110,435 391 1266.3 3%
Monroe 79 4,922 1 173.6 1%
Oconto 63 3,694 0 167.7 0%
Oneida 20 2,559 0 56.6 0%
Outagamie 524 16,073 9 283.6 2%
Ozaukee 253 7,143 15 286.6 6%
Pepin 1 575 0 13.8 0%
Pierce 73 2,801 0 175.5 0%
Polk 59 3,786 1 136.1 2%
Portage 181 5,643 0 256.4 0%
Price 2 965 0 14.8 0%
Racine 2,196 27,296 65 1123.9 3%
Richland 15 1,598 4 85.5 27%
Rock 897 15,749 24 554.5 3%
Rusk 11 794 0 77.6 0%
Sauk 119 7,160 3 187.1 3%
Sawyer 12 1,858 0 73.3 0%
Shawano 83 4,165 0 202.4 0%
Sheboygan 224 9,144 4 194.4 2%
St. Croix 202 6,536 1 229.8 0%
Taylor 16 1,051 0 78.6 0%
Trempealeau 129 3,511 0 438.2 0%
Vernon 38 2,505 0 124.5 0%
Vilas 10 1,242 0 46.3 0%
Walworth 677 9,489 18 657.2 3%
Washburn 4 1,174 0 25.5 0%
Washington 422 9,556 16 313.7 4%
Waukesha 1,317 27,644 39 330.2 3%
Waupaca 128 5,082 10 248.8 8%
Waushara 34 3,678 0 141.0 0%
Winnebago 701 18,388 13 412.5 2%
Wood 79 5,348 1 107.8 1%
Total 31,055 579,637 796 537.4 3%

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