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Coronavirus crowd study: German researchers find ‘glimmers of hope’ after inviting thousands to indoor concert in Leipzig

In one scenario modeled by the scientists, the infection risk for participants and their contacts was around 70 times lower when health and safety instructions were followed, compared with what it could have been under pre-pandemic behavior.

“A concert or handball game with a strictly enforced safety protocol is safer than the participation in a big wedding,” said Michael Gekle, the dean of the medical department at the Martin Luther University of Halle-Wittenberg, who was involved in the research.

The scientists’ conclusions are based on an experiment that drew around 1,400 people to an indoor concert simulation in August, hosted in one of the country’s largest venues in the eastern German city of Leipzig.

The researchers from the Martin Luther University of Halle-Wittenberg, a public institution, used tracking devices to gather data on the movements and behavior of participants, all of whom had to test negative for the virus to be allowed to participate. Over the following two months, the data gathered during the day-long experiment in August was fed into a computer simulation to estimate the hypothetical spread of the coronavirus for varying safety protocols and infection rates.

Finding a balance between economic incentives to fill a venue as much as possible and safety constraints to limit the risks was the main goal of the experiment that looked at three scenarios.

In the first, participants — while still wearing masks — pretended that the pandemic did not exist, allowing the researchers to create a detailed computer simulation of a concert with no social distancing and with an auditorium at full capacity.

In the second scenario, organizers imposed light social distancing rules and reduced the number of participants. This scenario, the researchers said Thursday, would provide sufficient safety to hold indoor events up to an infection rate of 50 new cases per 100,000 people within a week. Germany deems regions that cross this threshold as risk areas.

Events could still be held with infection levels above that rate, the researchers found, but only if organizers were to follow stringent distancing, as modeled in a third scenario.

In all three scenarios, participants had assigned seats.

The researchers cautioned that participants’ safety largely depends on face masks and on indoor ventilation systems, which were both found to play a critical role in preventing infections.

Germany already approved a $580 million program last month to improve ventilation systems in museums, theaters and other spaces. As long as no effective vaccine has been widely distributed more funding for ventilation will be needed, said Stefan Moritz, who headed the experiment. “This pandemic won’t be over in a few months,” he said.

In the lead-up to the concert, the prospect of the experiment sparked hate mail and accusations that it would become a superspreader event, but the researchers said Thursday that the concert had resulted in no known infections.

The release of their findings Thursday came at a pivotal time in Germany, and one day after Chancellor Angela Merkel announced a month-long partial national lockdown this

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German health minister tests positive for coronavirus

BERLIN (Reuters) – German Health Minister Jens Spahn tested positive for the coronavirus on Wednesday afternoon, the health ministry said, adding that he had placed himself in home quarantine.

The minister, 40, was suffering from cold-like symptoms, the ministry said. People he had been in contact with were being informed.

A government spokesman said Spahn had attended a cabinet meeting earlier on Wednesday, but other cabinet ministers would not necessarily have to go into quarantine.

“The federal cabinet meets in compliance with hygiene and distance rules, which aim to ensure that even if a person who later tests corona-positive were to participate, quarantining of other or even all participants would not be necessary,” he said.

While Germany’s infection rates are lower than in much of Europe, they have been accelerating and hit a daily record of 7,830 on Saturday, according to the Robert Koch Institute, Germany’s federal disease prevention agency.

“My best wishes for @jensspahn,” tweeted Europe Minister Michael Roth. “Hopefully he will be back on board soon. Healthy and committed. We need everyone and anything now in the fight against the #Corona.”

Spahn has urged Germans to stick to social distancing rules to keep infections at a manageable level.

Earlier this month, he said Germans face a “test of character” to contain a surge in the number of coronavirus cases.

Spahn, a popular member of Chancellor Angela Merkel’s government, had been expected to run for the leadership of their Christian Democrats earlier this year but backed Armin Laschet, premier of Germany’s most populous state North Rhine-Westphalia.

The party will pick a new leader in December.

(Reporting by Thomas Escritt and Paul Carrel; Writing by Thomas Escritt and Paul Carrel; Editing Peter Graff)

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