Hundreds of scenario combinations are run to produce the following "What if?" estimates of viral propagation under different conditions.

- "v1" contains the strategies discussed in the paper.
- "v3" contains a visual illustration of the method, linked above.
- "v5" was used in part to brief the BMBF on Apr/9 about school re-opening options.
- "v6" was a rapid work-in-progress that was superceded by v7.
- All others contain strategies that were in the public discussion after the above paper was made available.

The model is under intense development. The following versions have been released:
