No proof (yet) of a post-election “surge” in Wisconsin coronavirus cases

No proof (yet) of a post-election “surge” in Wisconsin coronavirus casesVoters exercise their right in primary election, despite shelter-in-place coronavirus order

Wisconsin’s midpandemic election was a unique spectacle.

The courtroom drama preceding the vote — and Wisconsin’s status as the only state with a primary election around this time that didn’t delay or cancel in-person voting — drew national attention and criticism.

The fundamental question was simple: What would this do to the state’s coronavirus trends? Though polling places on April 7 attempted to institute social distancing, voters said it was impossible to maintain at all times, particularly in Milwaukee and Green Bay where masses of voters were shuttled through just a handful of locations.

A few people have tried to answer this question in the time since, including an April 17 article shared widely on Facebook. (The author did not reply to a request for comment.) The story claimed “immense consequences” from in-person voting, with this headline: “New Virus Cases Surge in Wisconsin a Week After Republicans Forced In-Person Election to Go Forward.”

Have confirmed coronavirus cases really surged after the in-person election?

No, they haven’t. At least not yet. Here’s what we found.

Claim: Coronavirus cases 'surge' in Wisconsin after in-person election

The article, posted by the website Second Nexus, pulled its sole statistical evidence from a tweet by Topher Spiro, a health policy analyst with more than 100,000 followers on Twitter.

He posted a chart showing a dip in the number of positive cases on April 13, followed by increases each of the next three days. The accompanying text said, “Check out the uptick in transmission the GOP caused by forcing an in-person election in Wisconsin.”

People who contract COVID-19, the disease caused by coronavirus, typically don’t start showing symptoms for about five days. A study of 181 cases in China found the median incubation period — time before symptoms show — was five days, and only 1% first showed symptoms after 14 days (hence the standard 14-day quarantine).

Spiro and the Second Nexus story are starting with a point about a week after the April 7 election and saying the increase in new cases is connected.

But there are several critical data errors here.

First, calling the post-April 13 increase a trend assumes that April 13 is a valid baseline. If the state had been at the April 13 level for some time, then an increase from that level could be proof of a new trend.

But that’s not what happened.

April 13 was a very unusual day for coronavirus testing. The state administered an average of 1,600 coronavirus tests daily in the first three weeks of April. But on April 13 it administered only 940 — nearly 700 fewer than average and about 400 fewer than another day with lower testing numbers.

Predictably, with fewer tests came fewer positive results, and a large dip in the number of new confirmed cases.

The rise in the days after — identified by the story as proof of the election impact — was actually a result of the number of tests growing to 1,355, then 1,495, then 1,802 the four days after April 13. Before and after that date, the percentage of tests that came back positive remained about the same: between 9% and 10%

When presented with this data, Spiro deleted his tweet.

“It looks like testing has increased since April 13 and the positive rate has remained roughly constant,” he said in an email to PolitiFact Wisconsin.

What’s really happening

The truth is, at the time of the Second Nexus article — and this one — it’s too soon to say what impact the election had on Wisconsin’s coronavirus outbreak.

But so far there is no sign of an increase, said Andrea Palm, secretary of the Wisconsin Department of Health Services. In the state’s daily coronavirus briefing on Monday, she also noted the time between contracting the disease and being a confirmed case involves more than just the five-day median incubation time.

“I think folks do need to remember sort of the progression of this virus, from infection to symptoms to the conversation with your physician to the test to the test results,” Palm said. “It’s not surprising that we have not seen … a large uptick from in-person voting.”

RELATED: Tracking coronavirus in Wisconsin

If we look closer at the data before and after April 13, we see the state has so far seen no change in the frequency of new cases.

The state averaged 153 new cases per day the week before April 13, and 153 the week after. The percentage of tests coming back positive remained relatively consistent throughout that span.

And the number of people hospitalized with COVID-19 actually dropped, from 431 on April 13 to about 360 every day from April 17-20.

That’s not to say the election had no impact. There have been reports of infection potentially linked to the election.

The Milwaukee Journal Sentinel reported Monday that seven people appear to have contracted COVID-19 through activities related to the April 7 election. Six are voters, and one is a poll worker.

It’s too soon to say if there will be more, or if they in turn infected others. We don’t even know for sure that polling places are where those seven were infected.

But that certainly doesn’t constitute a “surge.”

Our ruling: False

We rate this claim False. The data the article cited failed to factor in a drop in the number of tests administered. It wrongly treated an unusually low number of cases on April 13 as a baseline against which to compare the following days’ new cases. The increase cited was in fact connected to an increased number of tests in the following days. We don’t know for sure what impact the election may prove to have, but we do know it’s wrong to say a surge has already surfaced.

Our fact-check sources

Second Nexus, New Virus Cases Surge in Wisconsin a Week After Republicans Forced In-Person Election to Go Forward, April 17, 2020Milwaukee Journal Sentinel, Tracking coronavirus in Wisconsin, accessed April 20, 2020Wisconsin Department of Health Services, COVID-19 Media Briefing – 4/20/2020Annals of Internal Medicine, The Incubation Period of Coronavirus Disease 2019 (COVID-19) From Publicly Reported Confirmed Cases: Estimation and Application, March 10, 2020Email exchange with Topher Spiro, health policy analyst, April 20, 2020Wisconsin Hospital Association, COVID-19 Situational Awareness Update, April 21, 2020Milwaukee Journal Sentinel, At least 7 new coronavirus cases appear to be related to Wisconsin's election, Milwaukee health commissioner says, April 20, 2020

Contact Eric Litke at (414) 225-5061 or elitke@jrn.com. Follow him on Twitter at @ericlitke.

Thank you for supporting our journalism. You can subscribe to our print edition, ad-free app or electronic newspaper replica here.

Source: https://www.usatoday.com/story/news/factcheck/2020/04/21/fact-check-no-proof-yet-post-election-coronavirus-surge-wisconsin/2997402001/

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