Fixes

code/datums/diseases/_disease.dm

@@ -119,7 +119,7 @@ GLOBAL_LIST_INIT(diseases, subtypesof(/datum/disease))
 
 	var/turf/target = affected_mob.loc
 	if(istype(target))
-		for(var/mob/living/carbon/C in oview(spread_range, affected_mob))
+		for(var/mob/living/carbon/human/C in oview(spread_range, affected_mob))
 			var/turf/current = get_turf(C)
 			if(current)
 				while(TRUE)
@@ -128,6 +128,8 @@ GLOBAL_LIST_INIT(diseases, subtypesof(/datum/disease))
 						break
 					var/direction = get_dir(current, target)
 					var/turf/next = get_step(current, direction)
+					if(!current.CanZASPass() || !next.CanZASPass(get_turf(turn(direction, 100))))
+						break
 					current = next
 
 /datum/disease/proc/cure()
@@ -153,8 +155,13 @@ GLOBAL_LIST_INIT(diseases, subtypesof(/datum/disease))
 
 /datum/disease/proc/IsSpreadByTouch()
 	if(spread_flags & CONTACT_FEET || spread_flags & CONTACT_HANDS || spread_flags & CONTACT_GENERAL)
-		return 1
-	return 0
+		return TRUE
+	return FALSE
+
+/datum/disease/proc/IsSpreadByAir()
+	if(spread_flags & AIRBORNE)
+		return TRUE
+	return FALSE
 
 /datum/disease/proc/remove_virus()
 	affected_mob.viruses -= src

code/datums/diseases/appendicitis.dm

@@ -9,7 +9,7 @@
 	viable_mobtypes = list(/mob/living/carbon/human)
 	desc = "If left untreated the subject will become very weak, and may vomit often."
 	severity = MINOR
-	disease_flags = CAN_CARRY|CAN_CARRY
+	disease_flags = CAN_CARRY|CAN_RESIST
 	visibility_flags = HIDDEN_PANDEMIC
 	required_organs = list(/obj/item/organ/internal/appendix)
 	bypasses_immunity = TRUE

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -116,7 +116,8 @@ var/global/list/image/splatter_cache=list()
 
 	if(viruses)
 		for(var/datum/disease/D in viruses)
-			perp.ContractDisease(D)
+			if(D.IsSpreadByTouch())
+				perp.ContractDisease(D)
 
 	amount--
 
@@ -131,10 +132,6 @@ var/global/list/image/splatter_cache=list()
 	if (amount && istype(user))
 		add_fingerprint(user)
 
-		if(viruses)
-			for(var/datum/disease/D in viruses)
-				user.ContractDisease(D)
-
 		if (user.gloves)
 			return
 		var/taken = rand(1,amount)
@@ -148,6 +145,11 @@ var/global/list/image/splatter_cache=list()
 		user.update_inv_gloves(1)
 		add_verb(user, /mob/living/carbon/human/proc/bloody_doodle)
 
+	if(viruses)
+		for(var/datum/disease/D in viruses)
+			if(D.IsSpreadByTouch())
+				user.ContractDisease(D)
+
 /obj/effect/decal/cleanable/blood/splatter
         random_icon_states = list("mgibbl1", "mgibbl2", "mgibbl3", "mgibbl4", "mgibbl5")
         amount = 2
@@ -273,11 +275,25 @@ var/global/list/image/splatter_cache=list()
 /obj/effect/decal/cleanable/mucus/Crossed(mob/living/carbon/human/perp)
 	if(viruses)
 		for(var/datum/disease/D in viruses)
-			perp.ContractDisease(D)
+			if(D.IsSpreadByTouch())
+				perp.ContractDisease(D)
+
+/obj/effect/decal/cleanable/mucus/attack_hand(mob/living/carbon/human/perp)
+	if(viruses)
+		for(var/datum/disease/D in viruses)
+			if(D.IsSpreadByTouch())
+				perp.ContractDisease(D)
 
 /obj/effect/decal/cleanable/vomit/Crossed(mob/living/carbon/human/perp)
 	if(viruses)
 		for(var/datum/disease/D in viruses)
-			perp.ContractDisease(D)
+			if(D.IsSpreadByTouch())
+				perp.ContractDisease(D)
+
+/obj/effect/decal/cleanable/vomit/Crossed(mob/living/carbon/human/perp)
+	if(viruses)
+		for(var/datum/disease/D in viruses)
+			if(D.IsSpreadByTouch())
+				perp.ContractDisease(D)
 
 #undef DRYING_TIME

code/modules/events/spontaneous_appendicitis_vr.dm

@@ -5,7 +5,7 @@
 			continue
 		if(!(A.z in using_map.station_levels))
 			continue
-		if(A.flag_check(RAD_SHIELDED))
+		if(A.flag_check(AREA_FORBID_EVENTS))
 			continue
 		if(isbelly(H.loc))
 			continue

code/modules/food/food/snacks.dm

@@ -1785,7 +1785,7 @@
 
 /obj/item/reagent_containers/food/snacks/badrecipe/Initialize()
 	. = ..()
-	reagents.add_reagent("toxin", 1)
+	reagents.add_reagent("salmonella", 1)
 	reagents.add_reagent("carbon", 3)
 
 /obj/item/reagent_containers/food/snacks/meatsteak
@@ -2551,7 +2551,7 @@
 			reagents.add_reagent("water", 10)
 		if(8)
 			reagents.add_reagent("carbon", 10)
-			reagents.add_reagent("toxin", 10)
+			reagents.add_reagent("salmonella", 10)
 		if(9)
 			reagents.add_reagent("nutriment", 5, nutriment_desc)
 			reagents.add_reagent("tomatojuice", 10)
@@ -3825,6 +3825,7 @@
 	reagents.add_reagent("protein", 5)
 	reagents.add_reagent("tomatojuice", 6)
 	reagents.add_reagent("mold", 8)
+	reagents.add_reagent("salmonella", 1)
 
 /obj/item/reagent_containers/food/snacks/slice/oldpizza
 	name = "moldy pizza slice"

code/modules/mob/living/carbon/human/life.dm

@@ -505,8 +505,12 @@
 	..()
 	//spread some viruses while we are at it
 	if(breath && !isnull(viruses) && prob(10))
+		if((wear_mask && (wear_mask.item_flags & AIRTIGHT)) || (head && (head && (head.item_flags & AIRTIGHT))))
+			return
+		if(wear_mask.permeability_coefficient < 1)
+			return
 		for(var/datum/disease/D in GetViruses())
-			if((D.spread_flags & SPECIAL) || (D.spread_flags & NON_CONTAGIOUS))
+			if(!D.IsSpreadByAir())
 				continue
 			for(var/mob/living/carbon/M in view(1,src))
 				ContractDisease(D)

code/modules/organs/internal/appendix.dm

@@ -7,10 +7,8 @@
 	var/inflame_progress = 0
 
 /mob/living/carbon/human/proc/appendicitis()
-	if(stat == DEAD)
-		return 0
-	ForceContractDisease(new /datum/disease/appendicitis)
-	return 0
+	return ForceContractDisease(new /datum/disease/appendicitis)
+
 /*
 /obj/item/organ/internal/appendix/process()
 	..()