Yes, I thought about it. Herdmen are Men, turned into beast because the Morokanth cheated. So technically a men-based-disease will affect men, mythological herdmen should be affected by a beast-disease. Ok, it is chaos anyway, so I decided humans in any form are affected by this newly created disease.
And yes, it is the work of a powerful Mallia Shamaness and the Player Chalana Arroy will the hero to handle this, with her bodyguards. I always planned to kick a CA in the center of the story to make her more as the typical war-medic.
BTW this campaign-idea is many years old and has nothing to do with the current situation π , however, to run it is linked to the fact we have nothing to do better than online gaming.