Why so much testing?
To ensure a safe working environment for all
The four figures in each column show the analyses for the different testing protocols. The text inserts give the story that the figures tell.
With no testing (top figures), the shoot should expect at least one case, and likely more, unless conducted in an area (Zone C) where the community infection and community transmission rates are low.
With daily testing (bottom figure), the risk is very low in any Zone C. Weekly testing (second row) makes a big difference.