guidance for particular "school" circumstances

[pearsonca]

Per NC DHHS meeting:

Deal a lot with schools opening / closing / merging / etc

Could provide a vignette decision-tree guide for how to handle these circumstances via what observations get assigned to what.

[pearsonca]

@WestonVoglesonger I think this is maybe a priority to address on imurun, and after we figure it out there, circle back to addressing it here (or tidyschoolvax?)

Definitely not an 0.2.0 item