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Variables of the models. Indexi indicates the cohort (e.g. school grade, department, or communityi).
| Variable | Interpretation |
|---|---|
| Si | susceptible/nai’ve persons in cohort i |
| Ii, d | Infected persons in cohort i on day d of infection who are not isolated |
| Hi, d | Similarly, but who are isolated (e.g. at home) |
| Ri | Recovered in cohort i |
