Not all agents are present in household layer in a hybrid population about covasim

[cliffckerr]

@AndrewC19 That's correct, the discrepancy is due to single-person households. I think the calculations you have above are correct -- a person is considered "in" a layer if and only if they have one or more contacts in that layer. As an extreme example, if every single household consisted of a single person (e.g., some kind of dorm situation), we wouldn't include that layer in the network, since there wouldn't be any contacts.

[AndrewC19]

On further inspection, I guess the discrepancy could be explained by single person households. If this is the case, is there an alternative way I can measure the number of individuals in each contact layer?

[AndrewC19]

Thanks for clearing that up @cliffckerr.

Just to confirm then, there is no way to see how many agents belong to each layer (home, school, workplace, community), irrespective of their contacts?

[cliffckerr]

I guess I'd phrase it a little differently...it's correct that there's no way to see how many agents were eligible to be in a particular layer, but the numbers you quoted above are the number of agents per layer. Depending on the way the network was generated (e.g. hybrid vs SynthPops), school enrollment can be <100%, and employment can be <100%. A 14-year-old who doesn't go to school is not in the schools layer with no contacts -- they're not in the schools layer. Likewise, a person living alone is not in the household layer with no contacts -- they're not in the household network.

[AndrewC19]

Thanks for the explanation, that makes sense.