Re the German outbreak in the meat processing plant:

Martin Exner, a hygiene and public health expert at the university of Bonn, spent two days analysing the Tönnies meat-processing plant in Gütersloh, where an entire district has been sent back into lockdown after around 1,500 employees were infected with Coronavirus.

Slaughterhouses have also been at the heart of Covid-19 outbreaks in America, France, and other German regions.

At a press conference, Exner said the air filtration system in the slaughter area had contributed to the spread of aerosol droplets laden with the virus, describing it as a “newly recognised risk factor”.
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Sorry, but that is not really a newly recognised risk factor. Newly appreciated, perhaps. Look at items two and three in this article.

This will, of course, potentially be a major factor as pubs and restaurants reopen.