In addition to the previous entry..
Quote:A single church service in Frankfurt, Germany, held in early May appears to have led to at least 107 reported cases of coronavirus in the area, according to a report from the Wall Street Journal. The outbreak highlights the risks that accompany easing lockdowns even in countries that have managed to control the spread of the virus relatively well. And it also serves as a reminder of the acute threat posed by “superspreader” events involving crowds, a pressing concern in the US as President Donald Trump encourages churches nationwide to reopen their doors to worshippers..One German church service resulted in more than 100 coronavirus infections - Vox
The main way people are getting sick with SARS-CoV-2 is from respiratory droplets spreading between people in close quarters. The risk of catching the coronavirus, simply put, “is breathing in everybody’s breath,” says Charles Haas, an environmental engineer at Drexel University. Droplets fly from people’s mouths and noses when they breathe, talk, or sneeze. Other people can breathe them in. That’s the main risk, and that’s why face masks are an essential precaution (they help stop the droplets from spewing far from a person’s mouth or nose).
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A crowded indoor place, then, with poor ventilation, filled with people talking, shouting, or singing for hours on end will be the riskiest scenario. A sparsely populated indoor space with open windows is less risky (but not completely safe). Running quickly past another jogger outside is on the other end of the spectrum; minimal risk.

