Counter measure features

[FHell]

It's very feasible with the engine we have now to allow for more sophisticated counter measure properties.

For example we could have conditional levels of activation for countermeasures, this might be possible to communicate in the user interface as well:

• inactive
• active when incidence > 10
• active when incidence > 50
• always active

We also might want to add background rate reduction (quarantine for international travelers).