We particularly will focus on:
- between-host variability in immune response to infection, inducing heterogeneous host statuses (task T1a);
- variability in shedding patterns among infectious hosts (task T1b);
- pathogen genetic variability within a given species, with a heterogeneous virulence of variants, potentially impacting the host shedding level (task T1c).
Herd characteristics which induce heterogeneous contacts between hosts and with the environment will be accounted for.