Update:
Added
ExileClient_object_player_event_onHandleDamage = "addons\ace_medical\functions\fnc_addDamageToUnit.sqf";
to CfgExileCustomCode
Also,when using ExileZ 2, zombies appear to do no damage until you go unconscious, after which they appear to kill you in about 5-10 seconds.
Damage from 0% hunger and and thirst still appear to affect Exile's HP, and I have not found an event for that in the client's functions. A workaround I am using now is to deal 100 damage to the player if their hunger/thirst gets to 0, but this is a bit harsh.