Reopening with a reduced maximum occupancy
https://www.nature.com/articles/s41586-020-2923-3
https://www.nytimes.com/interactive/2020/12/16/opinion/coronavirus-shutdown-strategies.html
The Magic Number for Reducing Infections and Keeping Businesses Open
Except we really should be operating at 100% capacity. Not 20%. Because the weight of these restrictions could potentially cripple the economy. Taking extra safety precautions "at the door" of our businesses should be more than enough to ensure an adequate level of protection against excess infections.
