[stem-dev] Prevalence Disease Model

["Thoens Christian" <Christian.Thoens@xxxxxxxxxxx>]

Hi all,

here is a list with the features I would like to implement in a
Prevalence Disease Model (Model with user specified prevalence,
https://bugs.eclipse.org/bugs/show_bug.cgi?id=380381). I think the
only place, where it makes sense to use such a model, is at the
beginning of "processing chain". In a simulation where the transmission
cattle->beef->human is modeled, we could use it to model a constant or
time dependant prevalence of a cattle disease. But the model should not
be used for beef, since the prevalence in beef depends on the one in
cattle. If the user already knows the prevalence in beef, he can just
model a beef->human chain without using cattle.

1. The user should be able to specify a constant or time dependent
prevalence.
2. The user should be able to specify a location (e.g. for two cattle
farms with different prevalences)
3. The prevalence is set by infecting newborn population members (I
can't think of a scenario where it makes sense to model migration to the
specified location, so infecting newborns is the only issue)

One question is if this model should be implemented as a Disease Model
or as an Infector, that sets the right prevalence at every timestep.
What do you think?

Regards,
Chris